This standard specifies the performance and devices of tractors, semi-trailers and semi-trailer trains with a total mass of less than 49 t. This standard applies to vehicles for drop and pull transport.
GB/T 13881 Road vehicles—Pneumatic braking connections between towing vehicles and trailers*, 2019-10-18 Update
GB/T 20070 Road vehicles.Mechanical coupling between tractors and semi-trailers.Interchangeability
GB/T 20716.1 Road vehicles Connectors for the electrical connection of towing and towed vehicles Part 1: Connectors for braking systems and running gears of vehicles with 24V nominal supply voltage
GB/T 5053.1 Road vehicles.Connectors for the electrical connection of towing and towed vehicles-7-pole connector type 24 N(normal)for vehicles with 24V nominal supply voltage
JT 719 Limits and measurement methods of fuel consumption for commercial vehicle for cargos transportation