词汇	folding step
释义	folding step 折叠式踏板
随便看	engine warming up engine warm up engine warm-up engine wash engine watch engine watch console engine water inlet engine water outlet hose connection engine water tube engine wear engine weight per horsepower Engine wheel engine windmilling speed engine winterization system engine with antechamber Engine with EMS engine with externally supplied ignition engine with opposed cranks engine with outside guide engine with revolving cylinders engine with supercharger engine wobble engine work engine, working-machine engine works