Theo dữ liệu từ Trung quốc Hải quan, Peru imported bridge cranes from China in 2021 worth $1.589 million, compared with $118000 in 2020. On the whole, in 2020, Peru imported a total of US $4.497 million of various cranes from China, compared with us $21.252 million in 2021, an increase of 373.27%. On a larger level, the total trade volume between China and Peru reached US $30.985 billion in 2021, an increase of 39.3% over the previous year. China has become Peru's largest trade partner for eight consecutive years. The continuous growth of the Peruvian crane market requires Chinese crane suppliers to correctly grasp the opportunity and win trust with quality and service.
Dongqi cần cẩu is an excellent crane supplier in China. It can provide Peru with a variety of bridge cranes and customized solutions. Bridge cranes can play an important role in handling large, heavy or dangerous goods, or when it is necessary to fix the damaged machinery immediately. They are widely used in the fields of automobile and transportation, aviation, concrete manufacturing, metal manufacturing, power plants, shipbuilding and so on. This paper will mainly introduce the types of bridge cranes under Dongqi crane and the working characteristics of different types. If you are interested in our products, you can click here to liên lạc với chúng tôihoặc cho chúng tôi biết bởi Email: sales010@cranesdq.com
Single Girder Overhead Crane sold to the Peru Price
Cầu trục trên không
Khoảng cách (m)
Nâng Cao(m)
Nguồn Cung Cấp(V)
Giá(USD)
1 tấn
7.5~31.5
6~30
220-480/3/50
$2200~40000
2 tấn
7.5~31.5
6~30
220-480/3/50
$2500~40800
3 tấn
7.5~31.5
6~30
220-480/3/50
$2600~41000
5 tấn
7.5~31.5
6~30
220-480/3/50
$3000~41500
10 tấn
7.5~31.5
6~30
220-480/3/50
$4000~45000
16 tấn
7.5~31.5
6~30
220-480/3/50
$5000~48000
20 tấn
7.5~31.5
6~30
220-480/3/50
$6000~50000
25 tấn
7.5~31.5
6~30
220-480/3/50
$8000~56000
Giá của các trên trên cầu cần cẩu sẽ thay đổi với các thị trường không có thông báo mới, chỉ để tham khảo. Nếu bạn cần một giá chính xác trong tương lai, xin vui lòng liên lạc với chúng tôi.
Double Girder Overhead Crane sold to the Peru Price
Cầu trục trên không
Khoảng cách (m)
Nâng Cao(m)
Nguồn Cung Cấp(V)
Giá(USD)
1 tấn
7.5~31.5
6~30
220-480/3/50
$4000-60000
2 tấn
7.5~31.5
6~30
220-480/3/50
$4500-62000
3 tấn
7.5~31.5
6~30
220-480/3/50
$5000-66000
5 tấn
7.5~31.5
6~30
220-480/3/50
$5800-72000
10 tấn
7.5~31.5
6~30
220-480/3/50
$6500-79000
16 tấn
7.5~31.5
6~30
220-480/3/50
$7800-86000
20 tấn
7.5~31.5
6~30
220-480/3/50
$8600-95000
25 tấn
7.5~31.5
6~30
220-480/3/50
$9800-110000
Giá của cần cẩu trên không sẽ thay đổi theo thị trường mà không cần thông báo và chỉ để tham khảo. Nếu bạn cần một mức giá chính xác trong tương lai gần, xin vui lòng liên hệ với chúng tôi.
Types of overhead cranes sold by Dongqi Crane to Peru
Grab Bucket Overhead Crane for sale to Peru
Grab crane is a heavy duty double girder overhead crane equipped with grab bucket, which can be used frequently. The lifting capacity of grab crane included the dead weight of the grab bucket is 5 ton to 25 tons. The working class of the grab crane is A6. The specifications of the grab crane is given in the following table for your reference and customized design can be provided by Dongqi crane.
As a professional lifting equipment, grab bridge crane is widely used in many industrial fields. Combining the characteristics of grab bridge crane and the economic development of Peru, we can deeply analyze its application in Peru.
Characteristics of grab bridge crane
Professional lifting equipment: grab bridge crane uses grab as lifting equipment, which is particularly suitable for grabbing loose and broken small materials, such as mineral powder, coke slag, coke, limestone, etc.
Structural composition: It is usually composed of a box-shaped bridge, a grab trolley, a trolley running mechanism, a driver's cab and an electrical control system. The overall structure is stable and the operation is reliable.
Hoạt động linh hoạt: grab bridge crane is flexible to operate and can efficiently complete operations such as unloading, stacking, reversing, material collection and loading.
High safety: The equipment is equipped with complete safety protection devices, such as limit switches, overload protection devices, emergency stop devices, etc., to ensure the safety of operations.
Economic development in Peru
Peru is an important economy in South Mỹ with rich mineral and agricultural resources. In recent years, Peru's economy has maintained steady growth, especially in the fields of mining, manufacturing and construction. The development of these industries requires a large number of lifting equipment to support the handling and loading and unloading of goods.
Application of grab bridge cranes in Peru
Khai thác: Peru has rich mineral resources such as copper, gold, silver, zinc, etc. In the mining process, a large amount of ore needs to be transported and stacked. With its professional grab slings and strong carrying capacity, grab bridge cranes are very suitable for ore handling, stacking and loading and unloading operations in mines.
Chế tạo: Peru's manufacturing industry is also growing and developing, especially in the fields of automobile manufacturing and machinery manufacturing. Grab bridge cranes can be used for material handling and assembly operations on production lines, especially in processes that require the handling of loose and broken materials. Its flexible operation and high efficiency are fully utilized.
Ngành xây dựng: With the acceleration of Peru's urbanization process, the construction industry has also ushered in a booming development. In the process of construction, a large amount of building materials such as steel bars and cement need to be transported to designated locations. Grab bridge cranes can efficiently complete the handling and stacking of these building materials, improving construction efficiency and quality.
Cảng và hậu cần: Peru's port and logistics industries have also developed rapidly and become an important hub for international trade. In ports and logistics centers, a large number of containers and bulk cargoes need to be loaded, unloaded and transported. Grab bridge cranes have been widely used in ports and logistics fields due to their efficient operation capabilities and safe and reliable performance.
Dongqi supply the single girder crane with lifting capacity: 1~20t, span:7.5~28.5m, lifting height 1~30m, low work class A3,A4. We also design and manufacture the nonstandard crane according users’ demanding.
Cần cẩu này được sử dụng trong môi trường xung quanh nhiệt độ-25 độ có thể đến+40 có thể,ẩm toán 85%,dưới độ cao 1000m, năng lượng cung cấp 3-ph, 380,50(có thể thay đổi như dùng nhu cầu).
LD single-girder bridge crane is a lifting equipment with compact structure, light weight and easy operation. Its working characteristics make it have wide application potential in many fields in Peru. The following is an analysis of the working characteristics of LD single-girder bridge crane and its application in Peru:
Working characteristics of LD single-girder bridge crane
This structure enables the crane to operate efficiently in a limited space and has strong adaptability.
Sức chứa lớn:
Despite its compact structure, LD single-girder bridge crane still has a strong carrying capacity and can meet various lifting needs.
The lifting weight range is wide and can be customized according to specific needs.
Flexible operation, safe and reliable:
The crane is equipped with advanced electrical control system and drive device, which is flexible to operate and responsive.
It is equipped with safety devices such as lifting and lowering limit switches and trolley travel switches to ensure safety and reliability during operation.
Energy saving and environmental protection:
LD single-girder bridge crane adopts energy-saving design to reduce energy consumption and reduce operating costs.
At the same time, its low noise and low emission characteristics also meet modern environmental protection requirements.
Application of LD single-beam bridge crane in Peru
Ngành sản xuất:
Peru's manufacturing industry is growing and developing, and LD single-beam bridge cranes can be used for material handling and assembly operations on production lines.
Its compact structure and flexible operation can adapt to various complex working environments and high-intensity operation requirements.
Khai thác:
Peru has rich mineral resources, and LD single-beam bridge cranes can be used for ore handling, stacking and loading and unloading operations in mines.
Its strong carrying capacity and stable operating performance can meet the high requirements of the mining field.
Warehousing and logistics:
Peru's warehousing and logistics industry is developing rapidly, and LD single-beam bridge cranes can be used for handling and stacking goods in warehouses.
Its efficient operating capacity and safe and reliable performance can ensure the efficient and safe operation of warehousing and logistics operations.
Xây dựng cơ sở hạ tầng:
Peru is actively promoting infrastructure construction, such as roads, railways, bridges, etc.
LD single-beam bridge cranes can be used for material handling and installation operations at construction sites, such as lifting of building materials such as steel bars and cement.
QC Electromagnetic Overhead Crane for sale to Peru
Cần cẩu điện từ QC là một loại vật liệu thiết bị xử lý, được trang bị cắt điện từ chuck và tương ứng với hệ điều hành để xử lý và nâng vật kim loại. Nâng lực của các điện từ trên không cần cẩu bao gồm những trọng lượng điện từ 5 đến 32 tấn. Các lớp học làm việc của điện từ cẩu là A5 và 6. Từ lâu thời gian là 10 đến 30 phút.
The QC electromagnetic bridge crane is a lifting equipment specially designed for handling metal materials. Its working characteristics make it have wide application potential in many fields in Peru. The following is an analysis of the working characteristics of the QC electromagnetic bridge crane and its application in Peru:
Working characteristics of the QC electromagnetic bridge crane
Powerful magnetic system:
The QC electromagnetic bridge crane is equipped with a removable electromagnetic disk, which can generate a strong magnetic field force to easily absorb and carry various magnetic metal materials.
The magnetic system is stable and reliable, ensuring that the material will not fall off or slip during the handling process.
Cấu trúc nhỏ gọn và hoạt động linh hoạt:
The crane adopts a bridge structure with a compact design and can operate efficiently in a limited space.
Flexible operation, horizontal movement and vertical lifting can be performed according to the operation requirements to meet the requirements of various complex working environments.
Sức chứa lớn:
The QC electromagnetic bridge crane has a strong carrying capacity and can lift heavy metal materials.
The carrying capacity can be customized according to specific needs to meet the needs of various operating scenarios.
An toàn và đáng tin cậy:
Equipped with complete safety protection devices, such as limit switches, overload protection devices, etc., to ensure safety during the operation process.
It is easy to operate and easy to master, which reduces the operation risk.
Application of QC electromagnetic bridge crane in Peru
Metallurgical industry:
Peru has rich mineral resources and a developed metallurgical industry. QC electromagnetic bridge crane can be used for the handling and stacking of metal materials in smelters, such as ingots, steel, pig iron blocks, etc.
Its powerful magnetic system and carrying capacity can easily cope with the handling needs of various heavy metal materials.
Mechanical manufacturing:
In the field of mechanical manufacturing, QC electromagnetic bridge crane can be used for material handling and assembly operations on production lines.
Especially in processes that require the handling of large amounts of metal materials, such as metal cutting and welding, its flexible operation and high efficiency are fully utilized.
Cảng và hậu cần:
Peru's port and logistics industry has developed rapidly and has become an important hub for international trade.
QC electromagnetic bridge crane can be used for loading and unloading and handling operations of metal materials in ports and logistics centers, such as the lifting and stacking of metal goods in containers.
Its compact structure and flexible operation enable it to complete operations efficiently even in limited space.
Scrap metal recycling:
In the field of scrap metal recycling, QC electromagnetic overhead crane can be used for the collection, sorting and stacking of scrap metal.
Its powerful magnetic system can easily absorb various scrap metals and improve recycling efficiency and quality.
Điện Hoist Trên cao dầm đôi cẩu là một cái cần cẩu với tời điện như chế nâng, với năng lực nâng 5 tấn 63 tấn, sử dụng cho tổng xử lý tài liệu và nâng. Các lớp học làm việc của tời điện trên không là A3 để A5.
Loại:LH
Sức nâng:5~63t
Nâng Cao:Khoảng:8m~32 m
Làm Nhiệm Vụ:A3~A5
Nhiệt Độ:-20~40 Độ C
LH double-beam bridge crane plays an important role in industrial production and logistics centers with its simple structure, convenient operation, stable operation and strong carrying capacity. Combined with its working characteristics, we can deeply analyze the wide application of LH double-beam bridge crane in Peru.
Working characteristics of LH double-beam bridge crane
Strong structure and strong carrying capacity:
LH double-beam bridge crane adopts double-beam structure, solid design, can withstand large loads, and ensure the safe operation of equipment.
Easy to operate and run smoothly:
The crane drives the reducer through the motor to drive the drum to rotate, realize the retraction and release of the wire rope and the lifting and lowering of the goods, and is easy to operate.
At the same time, its operation is stable, which reduces the shaking of the goods during the lifting process and improves the operation efficiency.
Phạm vi ứng dụng rộng:
LH double-beam bridge crane is suitable for lifting various goods, such as steel, building materials, port goods, etc., and is widely used in various industrial occasions.
Hiệu suất an toàn cao:
Equipped with complete safety protection devices, such as limit switches, overload protection devices, etc., to ensure safety during the operation process.
Application of LH double girder bridge crane in Peru
Ports and docks:
Peru has many ports and docks and is an important hub for international trade. LH double girder bridge cranes can be used to load and unload containers, bulk cargo and other goods in ports and docks. Its strong carrying capacity and smooth operation performance ensure the efficient and safe handling of goods.
Steel and metallurgical industry:
Peru's steel and metallurgical industry is well developed and requires a large amount of lifting equipment to support the operation of the production line. LH double girder bridge cranes can be used to lift raw materials, semi-finished products and finished products, such as billets, steel, steel coils, etc., which improves production efficiency and quality.
Construction site:
In Peru's construction site, LH double girder bridge cranes can be used to lift construction materials such as steel bars, concrete components, prefabricated beams, etc. Its sturdy structure and strong carrying capacity can cope with complex working environments and heavy cargo handling needs.
Machinery manufacturing and assembly lines:
In machinery manufacturing and assembly lines, LH double girder bridge cranes can be used to lift parts and finished products to achieve smooth operation of automated production lines. Its easy operation and smooth operation improve production efficiency and reduce labor costs.
Warehousing and logistics center:
The warehousing and logistics center in Peru requires a large amount of lifting equipment to support the handling and stacking of goods. LH double-beam bridge crane can be used for loading, unloading, handling and stacking of goods, improving the work efficiency of warehousing and logistics centers.
QD double girder overhead crane is composed of bridge, travelling mechanism, trolley, electric equipment. Main girder adopts box welded structure, crane travelling mechanism adopts separate drive, and lifting mechanism is equipped winch. All mechanism are controlled in driver’s cab.
Cầu trục dầm đôi model QD được ứng dụng trong kho hàng hở hoặc đường ray ngang để tiến hành các công việc bốc xếp và xử lý vật liệu thông thường. Đây là loại cầu trục chịu tải nặng đáp ứng nhu cầu sử dụng thường xuyên.
QD double-beam bridge crane has a wide range of applications in industrial production and logistics transportation due to its novel structure, beautiful shape, flexible and stable operation, safety and reliability. Combining these characteristics, we can deeply analyze the specific application of QD double-beam bridge crane in Peru.
Working characteristics of QD double-beam bridge crane
Compact structure and strong carrying capacity:
QD double-beam bridge crane adopts box-shaped main beam design, which is compact and stable, can withstand large loads, and ensure the safety and reliability of equipment in heavy-duty operations.
Flexible operation and smooth operation:
The crane has longitudinal and lateral movement functions, as well as vertical take-off and landing functions of the hook, which is flexible and convenient to operate.
At the same time, its smooth operation reduces the shaking of goods during lifting and improves operating efficiency.
An toàn và đáng tin cậy:
QD double-beam bridge crane is equipped with complete safety protection devices, such as limit switches, overload protection devices, etc., to ensure safety during operation.
In addition, its control room has a wide field of view, and all mechanisms can be operated in the control room, which improves the driver's work experience and safety.
Beautiful and durable:
The crane has a unique appearance design, a strong overall freshness, and a smooth shape, with high aesthetics and ornamental value.
At the same time, the process and materials used have high durability, which extends the service life of the equipment.
Application of QD double-beam bridge crane in Peru
Sản xuất công nghiệp:
In the field of industrial manufacturing in Peru, QD double-beam bridge cranes can be used to lift various heavy equipment and parts, such as machine tools, large workpieces on production lines, etc.
Its strong carrying capacity and flexible operation mode enable the equipment to efficiently complete various lifting tasks and improve production efficiency.
Ports and docks:
Peru's ports and docks are important hubs for international trade, and QD double-beam bridge cranes can be used for loading, unloading and stacking of containers.
Its compact structure and smooth operation enable the equipment to quickly and accurately complete the lifting and stacking tasks of containers, improving the operating efficiency of the port.
Ngành xây dựng:
In the construction industry in Peru, QD double-beam bridge cranes can be used to transport various building materials, such as steel bars, cement, prefabricated components, etc.
Its flexible operation mode and strong carrying capacity enable the equipment to easily cope with various complex construction working environments and improve construction efficiency.
Hậu cần&Kho bãi:
In the field of logistics and warehousing in Peru, QD double-beam bridge cranes can be used for loading, unloading, stacking and sorting of goods.
Its easy operation and smooth operation enable the equipment to improve space utilization and processing efficiency and reduce logistics costs.
Khai thác:
Peru has rich mineral resources, and there is a great demand for lifting equipment in the field of mining.
QD double-beam bridge cranes can be used to lift various heavy objects such as ores and slag. Its strong carrying capacity and stable performance enable the equipment to operate stably in harsh mining environments.
Cần cẩu cách nhiệt QY được sử dụng rộng rãi trong luyện xưởng của tụ kim loại, nhôm và magiê. Cách này trên không cần cẩu được thành lập bởi hộp-loại chính dầm, cẩu đi du lịch cơ chế xe đẩy và phần điện.
Để ngăn chặn dòng điện chạy qua cơ cấu nâng hạ đến cần trục và đe dọa đến tính mạng của người vận hành, các bộ phận của cần trục cách điện được bảo vệ bằng cách xử lý cách điện. Mức độ làm việc của cần trục cách điện là rất nặng, do đó, bộ phận nâng hạ chính được trang bị phanh kép để đảm bảo sản xuất an toàn.
QY insulated bridge crane has significant advantages in the power industry and other industrial fields that require an insulated environment due to its insulation design, safety, reliability, and precise control. Combined with its working characteristics, we can conduct an in-depth analysis of the wide application of QY insulated bridge cranes in Peru.
Working characteristics of QY insulated bridge crane
Insulation design:
QY insulated bridge crane adopts special insulation design and materials, which can isolate the electrical connection between the crane and power equipment to ensure that there will be no safety hazards caused by grounding in the power operating environment.
An toàn và đáng tin cậy:
The crane is equipped with a variety of safety protection devices, such as overload protection, limiters, emergency stopping devices, etc., which can ensure safety and reliability during lifting operations and prevent accidents.
Kiểm soát chính xác:
The crane is equipped with a precise control system, which can achieve precise control of lifting, walking and other actions to ensure the accuracy and efficiency of lifting operations.
Sturdy structure:
The crane adopts a bridge structure and has a stable overall frame, which can withstand large lifting loads. The moving mechanism is reasonably designed and can be flexibly moved on different construction sites.
Environmental protection and energy saving:
The crane adopts advanced electrical control systems and energy-saving technology, which can effectively utilize power resources, reduce energy consumption, and meet modern environmental protection and energy-saving requirements.
Application of QY insulated bridge crane in Peru
Electric power industry:
In Peru's power industry, QY insulated bridge cranes can be used for the construction and maintenance of power transmission and distribution lines, providing safe and reliable lifting services.
At the same time, it can also be used for the installation, maintenance and replacement of substation equipment, including the lifting operations of transformers, circuit breakers, isolation switches and other equipment.
Non-ferrous metal smelting:
Peru is rich in non-ferrous metal resources, such as aluminum, magnesium, etc. QY insulated bridge crane can be used in the smelting workshops of these non-ferrous metals to provide lifting services in high-temperature molten salt, large current, strong magnetic field, and dusty environments.
It can lift the upper structure and tank shell of the electrolytic cell, complete aluminum extraction and measurement, and lift the anode busbar lifting frame and other tasks.
Wind farm:
With the development of wind power in Peru, QY insulated bridge cranes can be used in the construction and operation of wind farms, providing installation, maintenance and replacement services for wind turbines and other equipment.
Its insulation performance and precise control capabilities enable lifting operations to be completed efficiently and safely in the complex environment of wind farms.
Other industrial areas:
In addition to the above fields, QY insulated bridge crane can also be used in other industrial fields that require an insulated environment, such as chemical industry, petroleum, natural gas, etc.
In these fields, cranes can provide safe and reliable lifting services and meet the needs of various complex operating environments.
European Double Girder Overhead Crane for sale to Peru
Châu âu trên cao dầm đôi cẩu là phiên bản mới nhất của cần cẩu trên cao được thiết kế với FEM tiêu chuẩn được phát triển trên cơ sở của truyền thống cẩu, do đó, châu Âu dầm đôi cẩu trên không đã đánh bại lợi thế, như là chưa từng có, hiệu suất, bó sát cấu trúc, ánh sáng chết trọng lượng an toàn, tin cậy, cao thực hiện, hiệu quả, và rộng rãi ứng dụng cho các ngành công nghiệp.
Do thiết kế lợi thế, châu Âu trên cao dầm đôi cẩu có thể giúp bạn thấp đầu tư ban đầu cho việc xây dựng nhà máy, tăng năng suất và thấp hơn cho những nỗ lực bảo trì hàng ngày, và giảm tiêu thụ năng lượng, và có được đầu tư cao hơn.
European-style double-girder bridge cranes are widely used in industrial production, logistics and transportation and other fields due to their remarkable features such as compact structure, light weight, smooth operation, convenient operation, and multiple protections. Combining these characteristics, we can conduct an in-depth analysis of the specific application of European double-girder overhead cranes in Peru.
Working characteristics of European double-girder bridge crane
Compact structure and light weight:
The European-style double-girder bridge crane adopts a compact design and has a light weight, which reduces the pressure on the factory structure and reduces the energy consumption of the equipment.
Smooth operation, no impact:
The crane uses high-quality key components and advanced control technology to start and run more smoothly, reduce shock and vibration, and improve operating efficiency.
Easy to operate and maintain:
The European-style double-girder bridge crane has a high degree of automation, flexible and easy operation, and adopts a unique design concept, mature manufacturing technology, low failure rate, and easy maintenance.
Multiple protections, more reliable:
The crane is equipped with multiple safety protection devices, such as limiters and overload protection devices, to ensure safety during operation and reduce operation risks.
The distance between the hook and the wall is small and the clearance is low:
The distance between the hook and the wall of the European-style double-girder bridge crane is smaller, and the low headroom design can make full use of the factory space and improve space utilization.
Application of European double-girder bridge crane in Peru
Sản xuất công nghiệp:
In the industrial manufacturing field in Peru, European-style double-girder bridge cranes can be used to lift heavy equipment and parts, such as machine tools and large workpieces on production lines. Its compact structure and light weight enable it to operate efficiently in a limited space while reducing energy consumption.
Ports and terminals:
Peruvian ports and terminals are important hubs for international trade. European double-girder bridge cranes can be used for loading, unloading and stacking of containers. Its smooth operation and no impact enable it to quickly and accurately complete the lifting and stacking tasks of containers and improve the operating efficiency of the port.
Ngành xây dựng:
In the Peruvian construction industry, European-style double-girder bridge cranes can be used to transport various construction materials, such as steel bars, cement, prefabricated components, etc. Its convenient operation and easy maintenance enable it to maintain efficient operation in complex construction operating environments and reduce maintenance costs.
Hậu cần&Kho bãi:
In the logistics and warehousing fields in Peru, European double-girder bridge cranes can be used for loading, unloading, stacking and sorting operations of goods. Its multiple protection and more reliable features enable it to improve the efficiency and accuracy of cargo handling while ensuring safety.
Energy and Mining:
Peru is rich in energy and mineral resources, and European-style double-girder bridge cranes can be used for equipment hoisting and transportation operations in the energy and mining fields. Its short distance from the hook to the wall and low headroom allow it to complete the lifting task of heavy equipment in a limited space and improve operating efficiency.
We are a crane manufacturer located in China, providing crane customization services to global crane customers. If you want to customize a Overhead Crane, you can leave a message on the website or Email: sales010@cranesdq.com, nói cho chúng tôi những thông tin sau, và chúng tôi quản lý bán hàng sẽ liên lạc với bạn:
Sức nâng (tấn): __ ?( Công suất định mức)
Nâng cao (m):__ ? (Chiều cao từ móc trung tâm đến tầng)
Khoảng cách (m): __ ? (Khoảng cách giữa trung tâm đường sắt)
Tốc độ nâng (m/phút): __ ? (Đơn, kép, biến)
Khoảng cách di chuyển (m): __ ? (Chiều dài của đường sắt)
Nhiệm vụ công việc: __ ? (Một ngày bao nhiêu giờ? Một giờ bao nhiêu lần?)