Dữ liệu từ Trung quốc Hải quan cho thấy rằng trong 2021 Algeria imported gantry cranes from China worth $897,000, compared with $70,000 in 2020. In terms of import quantity, a total of 2 sets of gantry cranes will be imported in 2021, with an average import price of US$448,500. In 2020, the import quantity will be 3 sets, with an average import price of US$23,300. Gantry cranes are commonly used outdoors. Depending on the lifting capacity and lifting height, the price will vary greatly. For example, the price of large Cổng trục container in ports is as high as hundreds of thousands of dollars, while di cần cẩu are only worth a few thousand dollars. Judging from the import volume, the gantry crane market in Algeria is not large.
As an excellent crane supplier in China, Dongqi Cần Cẩu can provide various types of gantry cranes to Algeria. This article will introduce the working characteristics and performance parameters of various types of gantry cranes one by one. 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
Portable Gantry Crane Sold To Algeria Price
Gantry Crane
Khoảng cách (m)
Nâng Cao(m)
Nguồn Cung Cấp(V)
Giá(USD)
0.25 tấn
2~12
1~9
220-480/3/50
$900~9000
0.5 tấn
2~12
1~9
220-480/3/50
$1200~12000
1 tấn
2~12
1~9
220-480/3/50
$1500~15000
2 tấn
2~12
1~9
220-480/3/50
$2000~20000
3 tấn
2~12
1~9
220-480/3/50
$3000~30000
5 tấn
2~12
1~9
220-480/3/50
$4500~46000
10 tấn
2~12
1~9
220-480/3/50
$7000~65000
The price of the above gantry gantry cranes will change with the market, without further notice, for reference only. If you need an accurate price in the near future, please liên lạc với chúng tôi.
The price of the above gantry gantry cranes will change with the market, without further notice, for reference only. If you need an accurate price in the near future, please contact us.
The price of the above gantry cranes will change with the market, without further notice, for reference only. If you need an accurate price in the near future, please contact us.
Types of gantry cranes provided by Dongqi Crane for Algeria
Single Girder Gantry Crane for Algeria
Đơn dầm cần cẩu là một thường xuyên cẩu sử dụng rộng rãi trong đất và mở kho để xếp dỡ vật liệu.
Tính năng:
Quá tải thiết bị bảo vệ để ngăn chặn cẩu của vô vượt quá khả năng đánh giá cao
Công tắc giới hạn để ngăn ngừa việc nâng quá mức và hạ quá mức
2 bước chuyển đổi giới Hạn để ngăn chặn overtransversing và overtravelling
Chốt an toàn trên móc
Âm thanh thiết bị tín hiệu mà kích hoạt khi các cần cẩu di chuyển
Xoay ánh sáng mà kích hoạt khi các cần cẩu di chuyển
Linh hoạt phẳng hệ thống cáp dây hoa cho qua đi du lịch cung cấp năng lượng và điện thoại di động kiểm soát cùng các cần cẩu cầu
Nút nhấn mặt dây chuyền hoàn chỉnh với cáp điều khiển và hộp thiết bị đầu cuối di động
Single beam gantry cranes have broad application potential in various fields in Algeria due to their unique working characteristics. The following is an analysis of the working characteristics of single beam gantry cranes and their possible application scenarios in Algeria:
1、 Working characteristics of single beam gantry crane
Light weight and simple structure: Compared to double beam cranes, single beam gantry cranes have a lighter weight and simpler structure, making installation, disassembly, and maintenance more convenient.
Moderate lifting capacity: Although the lifting capacity of a chùm đơn cần cẩu is relatively small compared to a double beam crane, it is fully capable of handling general small and medium-sized heavy lifting tasks.
Dễ dàng vận hành: Single beam gantry cranes are usually operated by a handle or remote control, making the operation more convenient and efficient.
Khả năng thích ứng mạnh mẽ: Single beam gantry cranes can be customized according to the actual size of the customer's site, with strong adaptability to meet different site and operational needs.
Smooth operation: The single beam gantry crane can maintain stability during operation, reducing interference and damage to the surrounding environment.
2、 Application of Single Beam Gantry Crane in Algeria
Steel market and shipyards:
The steel market and shipyards in Algeria need to handle a large amount of steel and ship components. Single beam gantry cranes can be used in these places to lift and transport heavy objects such as steel and ship components, improving work efficiency.
Ports and docks:
Algerian ports and terminals need to handle a large volume of containers and cargo. Although the lifting of large containers may require more powerful double beam cranes, single beam gantry cranes can play an important role in handling general cargo and small to medium-sized containers, improving loading and unloading efficiency.
Construction site:
On construction sites, single beam gantry cranes can be used to lift building materials, prefabricated components, etc., helping construction workers complete construction tasks quickly and accurately. Its simple structure and easy operation make it widely applicable on construction sites.
Warehouse Logistics Center:
The warehousing and logistics center in Algeria needs to handle a large amount of goods and inventory. Single beam gantry cranes can be used in these places for cargo handling, stacking, and sorting, improving warehousing and logistics efficiency.
Other industrial sectors:
In addition to the above-mentioned fields, single beam gantry cranes can also be applied to other industrial fields that require lifting and transporting heavy objects, such as machinery manufacturing, automobile manufacturing, etc.
Đôi dầm cổng cẩu là thích hợp cho kho bãi và cảng để nâng vật liệu.
Tính năng:
Quá tải thiết bị bảo vệ để ngăn chặn cẩu của vô vượt quá khả năng đánh giá cao
Công tắc giới hạn để ngăn ngừa việc nâng quá mức và hạ quá mức
Công tắc giới hạn 2 bước để ngăn chặn quá trình vượt quá và quá trình di chuyển
Chốt an toàn trên móc
Thiết bị báo hiệu âm thanh được kích hoạt khi cần cẩu di chuyển
đèn xoay được kích hoạt khi cần cẩu di chuyển
Hệ thống dây cáp dẹt linh hoạt để cung cấp điện di chuyển chéo và để điều khiển di động dọc theo cầu cần cẩu
Nút nhấn mặt dây chuyền hoàn chỉnh với cáp điều khiển và hộp thiết bị đầu cuối di động
The double girder gantry crane has demonstrated extensive application potential in multiple fields in Algeria due to its excellent working characteristics. The following is an analysis of the working characteristics of double girder gantry cranes and a discussion on their application in Algeria:
1、 Working characteristics of double girder gantry crane
Large lifting capacity and span:
The double girder gantry crane has a large lifting capacity and span, which can meet the lifting needs of heavy goods.
Overall stability is good:
The structure of this crane is compact, with good overall stability, and can maintain stable operation in complex environments.
High leg rigidity:
The legs of a double girder gantry crane have high rigidity and can withstand significant lateral forces, ensuring the safety of lifting operations.
Wide workspace:
Its design provides a large working space for the crane, making it convenient for operators to carry out various lifting operations.
Khả năng thích ứng mạnh mẽ:
Double beam gantry cranes can be customized according to different operational needs, with strong adaptability and the ability to meet the requirements of various complex environments.
Hiệu quả, và tiết kiệm năng lượng:
With the continuous advancement of technology, modern double girder gantry cranes usually adopt advanced control systems and energy-saving technologies, which improve work efficiency and reduce energy consumption.
2、 Application of Double Beam Portal Crane in Algeria
Ports and docks:
Algerian ports and terminals need to handle a large volume of containers and cargo. Double girder gantry cranes are very suitable for cargo loading, unloading, and handling in these places due to their large lifting capacity and span. They can efficiently lift and move heavy cargo, improving the operational efficiency of port terminals.
Shipbuilding plant:
In shipyards, double girder gantry cranes are used for lifting and assembling large ship components. Its strong lifting capacity and stable structure enable it to meet the lifting needs of heavy ship components, ensuring the smooth progress of the shipbuilding process.
Hydropower station:
Heavy equipment such as generators and transformers need to be lifted and installed during the construction of hydropower stations. The double girder gantry crane can undertake the lifting task of these heavy equipment, ensuring the smooth progress of hydropower station construction.
Large industrial parks:
In large industrial parks in Algeria, double girder gantry cranes can be used for the handling and stacking of various heavy goods. Its efficient operational capability and vast workspace make it an indispensable equipment in industrial parks.
Construction site:
On construction sites, double beam gantry cranes can be used to lift and install various building materials and components, such as steel structures, prefabricated beams, etc. Its stable structure and efficient operational capabilities enable it to cope with various complex building environments.
Ore mining and smelting:
Algeria has abundant mineral resources, and the mining and smelting processes require the handling of large amounts of heavy ore and equipment. The double girder gantry crane can undertake the lifting and handling tasks of these heavy goods, ensuring the smooth progress of ore mining and smelting processes.
Một Bán Cổng Duy nhất/Dầm Đôi cẩu được sử dụng trong các ứng dụng như một công cụ phòng nơi phần việc của vịnh là cần thiết, hoặc trong trang, nơi một giàn đường sắt có thể được cài đặt bên cạnh một cấu trúc hiện có.
Tính năng:
Quá tải thiết bị bảo vệ để ngăn chặn cẩu của vô vượt quá khả năng đánh giá cao
Công tắc giới hạn để ngăn ngừa việc nâng quá mức và hạ quá mức
2 bước chuyển đổi giới Hạn để ngăn chặn overtransversing và overtravelling
Chốt an toàn trên móc
Âm thanh thiết bị tín hiệu mà kích hoạt khi các cần cẩu di chuyển
Xoay ánh sáng mà kích hoạt khi các cần cẩu di chuyển
Hệ thống dây cáp dẹt linh hoạt để cung cấp điện di chuyển chéo và để điều khiển di động dọc theo cầu cần cẩu
Nút nhấn mặt dây chuyền hoàn chỉnh với cáp điều khiển và hộp thiết bị đầu cuối di động
As an important lifting equipment, the bán cần cẩu has a wide range of application potential in various fields in Algeria due to its simple structure, large lifting capacity, wide applicability, safety and reliability. The following is an analysis of the working characteristics of semi gantry cranes and a discussion on their application in Algeria:
1、 Working characteristics of semi gantry crane
Sức chứa lớn:
The semi gantry crane has strong lifting capacity and can meet the lifting needs of goods of different weights. Its lifting capacity varies from several hundred kilograms to several hundred tons depending on the model and configuration.
Simple and stable structure:
The bracket of the crane is built on the ground, and the cantilever beam extends to the working area, forming a semi portal appearance. The structure is relatively simple and stable. This structure makes the crane run more smoothly and reduces interference with the surrounding environment.
Hoạt động linh hoạt:
Semi gantry cranes are usually controlled manually, electrically, or automatically, making them flexible and convenient to operate. Operators can choose appropriate control methods according to actual needs to improve work efficiency.
Khả năng thích ứng mạnh mẽ:
The semi gantry crane can be customized according to different working environments and needs, such as indoor, outdoor, high temperature, dry and other environments. This enables the crane to maintain stable operation in various complex environments.
Bảo trì dễ dàng:
The maintenance of a semi gantry crane is relatively simple, and key parts can be regularly inspected and maintained to ensure its long-term stable operation. This reduces the maintenance cost of the crane and increases its service life.
2、 Application of Semi gantry Crane in Algeria
Ports and docks:
Algerian ports and terminals need to handle a large volume of containers and cargo. The semi gantry crane is very suitable for cargo loading, unloading, and handling in these places due to its simple structure and large lifting capacity. They can efficiently lift and move heavy cargo, improving the operational efficiency of port terminals.
Factories and workshops:
In factories and workshops in Algeria, semi gantry cranes can be used for the handling and stacking of various heavy goods. Its stable structure and flexible operation enable the crane to adapt to various complex working environments and improve work efficiency.
Ore mining and smelting:
Algeria has abundant mineral resources, and the mining and smelting processes require the handling of large amounts of heavy ore and equipment. The semi gantry crane can undertake the lifting and handling tasks of these heavy goods, ensuring the smooth progress of ore mining and smelting processes.
Construction site:
On construction sites, semi gantry cranes can be used to lift and install various building materials and components, such as steel structures, prefabricated beams, etc. Its powerful lifting capacity and stable structure enable the crane to cope with various complex building environments and improve building efficiency.
Warehouse Logistics Center:
The warehousing and logistics center in Algeria needs to handle a large amount of goods and inventory. A semi gantry crane can be used for handling, stacking, and sorting goods, improving the efficiency of warehousing and logistics. Its flexible operation mode and powerful lifting capacity make the crane have a wide range of application prospects in warehousing and logistics centers.
Cần trục cổng chữ A, cũng được biết đến như Một khung cần cẩu hoặc nhiệm vụ ánh sáng cần cẩu rất thích hợp cho một loạt các ứng dụng. Thông thường đây là những nhỏ cổng cần cẩu cho nhẹ nhiệm vụ nâng yêu cầu. Trang bị hạng nặng thầu dầu bánh xe cần cẩu có thể dễ dàng di chuyển xung quanh nơi làm việc và bị nhốt trong khi cần thiết. Các cần cẩu là lý tưởng đối với dây chuyền lắp ráp, hội thảo, dịch vụ vịnh và địa điểm tạm thời.
Tính năng:
Xoay thầu dầu bánh xe với phanh
Quá tải thiết bị bảo vệ
Công tắc giới hạn để ngăn ngừa việc nâng quá mức và hạ quá mức
Chốt an toàn trên móc
Cấp bảo vệ IP 54 cho tất cả động cơ
Nút nhấn mặt dây chuyền hoàn chỉnh với cáp điều khiển
Hệ thống cáp phẳng linh hoạt cho nguồn điện di chuyển chéo
The A-type gantry crane has shown great potential for application in multiple fields in Algeria due to its unique working characteristics and wide applicability. The following is an analysis of the working characteristics of A-type gantry crane and its application in Algeria:
1、 The working characteristics of A-type gantry crane
Sturdy structure and strong adaptability:
The A-type gantry crane usually adopts a box shaped double beam welded structure, which is sturdy and durable, and can withstand large lifting loads. At the same time, its design has strong adaptability and can be customized according to different operating environments and needs, such as open-air warehouses, material yards, railway freight stations, port and dock cargo areas, etc.
Strong lifting capacity:
The A-type gantry crane has strong lifting capacity and can lift and transport heavy goods. This lifting capacity is particularly important for places that require handling large amounts of heavy cargo, such as ports, ore mining, and smelters.
Flexible and stable operation:
A-type gantry cranes are usually equipped with advanced operating systems and control equipment, making the operation more flexible and smooth. Meanwhile, it has good structural stability and can maintain stable operation in complex environments.
Equipped with multiple specialized lifting devices:
The A-type gantry crane can also be equipped with various specialized lifting devices, such as electromagnetic suction cups, grab buckets, etc., for certain special operations. This makes the crane more flexible and efficient in handling different types of goods.
Bảo trì dễ dàng:
The design of A-type gantry crane is convenient for transportation, installation, and maintenance. Key parts can be regularly inspected and maintained to ensure their long-term stable operation.
2、 Application of A-type gantry crane in Algeria
Ports and docks:
Algerian ports and terminals need to handle a large volume of containers and cargo. The A-type gantry crane is very suitable for cargo loading, unloading, and handling in these places due to its strong lifting capacity and operational flexibility. They can efficiently lift and move heavy cargo, improving the operational efficiency of port terminals.
Ore mining and smelting:
Algeria has abundant mineral resources, and the mining and smelting processes require the handling of large amounts of heavy ore and equipment. The A-type gantry crane can undertake the lifting and handling tasks of these heavy goods, ensuring the smooth progress of ore mining and smelting processes.
Railway freight stations and logistics centers:
At railway freight stations and logistics centers, A-type gantry cranes can be used for rapid loading, unloading, and stacking of goods. Its structure is sturdy and has strong lifting capacity, which can withstand the weight of a large amount of goods. At the same time, it is flexible in operation and can quickly complete the task of transporting goods.
Large industrial parks:
In large industrial parks in Algeria, A-type gantry cranes can be used for the handling and stacking of various heavy goods. Its powerful lifting capacity and operational flexibility make it one of the indispensable equipment in industrial parks.
Construction site:
On construction sites, A-type gantry cranes can be used to lift and install various building materials and components, such as steel structures, prefabricated beams, etc. Its structure is stable and has strong lifting capacity, which can cope with various complex building environments and improve building efficiency.
Simple mobile gantry crane is manufactured for lifting equipment, loading and unloading of the warehouse, maintaining heavy-duty equipment and transporting materials, applicable for small and medium factory. The best advantage of the crane is omni-directional movability, fast to assembly, small volume, can be moved to another are only with a minicar. Capacity is 0.25t-10t, span is 12m. Brake bearing universal wheel can move on the ground, be used together with electric hoist, chain block, monorail trolley, realizing crane mechanization, which can reduce the human power,production costs, and improve work efficiency.
Mục
Cổng trục di động
Dung tích
0.5
1
2
3
5
10
Khoảng cách
2-12m (như của bạn yêu cầu)
Chiều cao
1-10m (như của bạn yêu cầu)
Bánh xe
4
Thiết bị
Manual / Electric Chain hoist or wire rope hoist
Sức mạnh
380V50HZ3P hoặc chỉnh
Portable gantry cranes play an important role in modern industrial production and logistics due to their lightweight, high strength, easy installation and operation, and strong environmental adaptability. Based on its working characteristics, the following is a detailed analysis of the application of portable gantry cranes in Algeria:
1、 Working characteristics of portable gantry crane
Lightweight and High Strength:
The portable gantry crane is made of high-strength materials, ensuring structural stability while achieving lightweight equipment. This makes the crane more convenient for transportation, installation, and use, reducing the requirements for the site.
Easy to install and operate:
Installation can be completed manually without the need for complex professional tools and equipment. The operation interface is simple and intuitive, making it easy for operators to get started and improving work efficiency.
Strong environmental adaptability:
Has good corrosion resistance and can operate stably in harsh chemical and humid environments. At the same time, its easy to clean characteristics make it suitable for places with high hygiene requirements, such as food processing and pharmaceutical manufacturing industries.
Adjustable height and span:
The portable gantry crane can flexibly adjust its height and span to adapt to different sites and operational needs. Whether it's a small space or a large workshop, it can handle it with ease.
High efficiency load:
The load capacity is usually high enough to handle most material conveying tasks. This provides a strong guarantee for the efficient production of enterprises.
Economical and practical:
Convenient transportation reduces transportation costs. At the same time, its efficient work efficiency and wide range of application fields make the equipment have a high cost-effectiveness.
2、 Application of portable gantry crane in Algeria
Construction site:
On construction sites in Algeria, portable gantry cranes can be used to lift and install various building materials and components, such as steel bars, concrete components, pipelines, etc. The adjustability of its height and span enables the crane to adapt to buildings of different sizes and shapes, improving construction efficiency.
Ports and docks:
Algerian ports and terminals need to handle a large volume of containers and cargo. Portable gantry cranes can be used for loading, unloading, and stacking goods, improving port logistics efficiency. Its lightweight and high-strength characteristics enable the crane to maintain stable operation in complex environments such as ports.
Sản xuất
In Algeria's manufacturing industry, portable gantry cranes can be used for production line handling, assembly, and other processes. Its accurate positioning ability and adjustable height make it an ideal choice for assembling large mechanical equipment. Meanwhile, its easy to clean and corrosion-resistant characteristics make cranes widely used in industries such as food processing and pharmaceutical manufacturing.
Hậu cần&Kho bãi:
The logistics and warehousing center in Algeria needs to handle a large amount of goods and inventory. Portable gantry cranes can be used for rapid handling and stacking of goods, improving the utilization of storage space. Its efficient work efficiency and wide application fields make cranes an indispensable equipment in the logistics and warehousing field.
Other fields:
In addition to the above-mentioned fields, portable gantry cranes can also be used for material handling and assembly work in automobile manufacturing factories, mechanical processing workshops, and other places. Its flexibility and efficiency enable cranes to play an important role in these fields as well.
The electric trolley gantry crane is a mid –light type gantry crane, equipped with electric and crane hooks, with the obvious features of “ L” shape legs, which makes the crane more convenient for handling cargo with long length, such as, steel pipe, etc. The lifting capacity of the electric trolley gantry crane is 5 to 32 ton and working class is A5 and A6. The parameters are as following:
Sản Phẩm Loại
L
Sức Nâng
5~32t
Chiều dài nhịp
18~35
Nhóm phân loại
A5, 6
Nhiệt Độ
-25~40℃
The L-shaped electric trolley gantry crane plays an important role in multiple industrial fields due to its unique design and efficient performance. Based on its working characteristics, the following is a detailed analysis of the application of L-type electric trolley gantry crane in Algeria:
1、 Working characteristics of L-shaped electric trolley gantry crane
Compact structure and stable performance:
The L-shaped electric trolley gantry crane has a compact structure and reasonable design, which makes it highly stable and reliable in practical applications. This stability is not only reflected in the smooth operation of lifting operations, but also in the adaptability to complex environments.
Large lifting space and strong crossing capacity:
This crane has a large lifting space and over span capacity, and can easily transport objects from the inside of the span to under the cantilever. It is suitable for work environments that require frequent crossing of obstacles.
Easy to operate, safe and reliable:
The L-shaped electric trolley gantry crane is equipped with an advanced electrical control system, which is easy to operate and user-friendly. At the same time, its safety protection measures are complete, such as overload protection, low voltage protection, remote control, etc., ensuring the safety and reliability of lifting operations.
Easy maintenance and long service life:
The structural design of the crane is reasonable and easy to maintain and upkeep. Made of high-quality steel, it has high wind resistance and corrosion resistance, and can operate stably in harsh environments for a long time.
Customized services:
The L-shaped electric trolley gantry crane can be customized according to the actual needs of customers, such as adjusting lifting capacity, span, cantilever length and other parameters to meet the requirements of different working environments.
2、 Application of L-type electric trolley gantry crane in Algeria
Ports and docks:
Algerian ports and terminals need to handle a large volume of containers and cargo. The L-shaped electric trolley gantry crane is very suitable for cargo loading, unloading, and handling in these places due to its compact structure, large lifting space, and easy operation. It can efficiently lift and move heavy goods, improving the operational efficiency of port terminals.
Sản xuất
In the manufacturing industry of Algeria, L-shaped electric trolley gantry cranes can be used for material handling and assembly work on production lines. Its precise positioning and stable operational performance enable the crane to accurately lift and place materials, improving the automation level and operational efficiency of the production line.
Warehouse logistics:
The warehousing and logistics center in Algeria needs to handle a large amount of goods and inventory. The L-shaped electric trolley gantry crane can be used for rapid handling and stacking of goods. Its efficient operational capability and wide applicability make cranes an indispensable equipment in the field of warehousing and logistics.
Construction site:
On construction sites, L-shaped electric trolley gantry cranes can be used for lifting and installing various building materials and components. The compact structure and large lifting space of the crane enable it to adapt to buildings of different sizes and shapes, improving construction efficiency and quality.
Other fields:
In addition to the above-mentioned fields, L-shaped electric trolley gantry cranes can also be used for material handling and assembly work in industries such as papermaking, metallurgy, energy and power. Its flexibility and efficiency enable cranes to play an important role in these fields as well.
Different types of gantry cranes sold from China to Algeria
10t Single Girder Beam Gantry Crane with Grab for sale to Algeria
Tải trọng nâng: 10 tấn
Lifting height: 8 meters
Span: 10 meters
Điện áp làm việc: 380/3/50
Mining Place Using Single Girder Gantry Crane for sale to Algeria
Tải trọng nâng: 10 tấn
Chiều cao nâng: 6 mét
Khoảng cách: 15 mét
Điện áp làm việc: 380/3/50
20 ton Customized Simple Manual Push Gantry Crane for sale to Algeria
Nâng cân: 20 tấn
Chiều cao nâng: 7 mét
Khoảng cách: 15 mét
Điện áp làm việc: 380/3/50
Single Girder Junkyard Gantry Crane 5t with Grab for sale to Algeria
Lifting weight: 20 tons
Lifting height: 30 meters
Span: 10 meters
Điện áp làm việc: 380/3/50
Mobile Customized a Frame Mini Gantry Crane for sale to Algeria
Lifting weight: 5 tons
Lifting height: 8 meters
Span: 12 meters
Điện áp làm việc: 380/3/50
Làm thế nào để tùy chỉnh giàn cần cẩu từ Trung Quốc
We are a crane manufacturer located in China, providing crane customization services to global crane customers. If you want to customize a gantry 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?)