The C70 general-purpose gondola is mainly used for general-purpose railway wagons for loading coal, ore, building materials, machinery and equipment, steel and timber. In 2005, based on the mature technology of the C80 series of coal gondola cars on the Daqin line, the C70 was successfully developed and started production. Type C70 gondola is a symbolic product of 70t-class railway freight cars. In addition to manual loading and unloading, the 70t-class general-purpose gondola can also be adapted to mechanized unloading operations such as wagon tippers, and can also meet the requirements of thawing warehouses.

The use of container lock.The head of the international box lock is upwards for the working position, and downwards for the non-working position.

The overhaul limit of railway freight cars refers to the regulations on the degree of damage allowed to the parts and components of freight cars when the freight cars are overhauled. It is an extremely important technical regulation for freight cars. Whether the overhaul limit is set reasonably or not has a direct impact on the quality of the vehicle used and the economic effect of truck overhaul.