tractors拖拉机tractorn.【C】拖拉机；牵引车tractor trailer implement机引农具tractor-mounted sprayer悬挂式喷雾机tractor back-wall blank拖拉机后壁板tractor-mounted combine拖拉机悬挂式联合收获机tractor-drawn cultivator机引中耕机tractor-drawn seed drill拖拉机牵引条播机tractor-mounted elevator装在拖拉机上的升运器tractor articulated roller拖式路滚tractor-trailer trucking牵引式挂车运输tractor-propelled plough机引犁