truck tractor meaning in Chinese

货运拖曳汽车。

Air brake line couplings between truck tractors and trailers
载重牵引车和拖车间的空气制动线性联接器
Seven conductor electrical connectors between truck tractors and trailers
载重牵引车和拖车间的七芯导线联接器
Mounting method of brake line and electrical connectors between truck tractors and trailers
货车牵引车及挂车间制动片和电连接器的安装方法
Braking , stability , and control performance test procedures for air - brake - equipped truck tractors
配备有空气制的牵引车的制动稳定性和控制性能的试验程序