A system or device for doing work, as an automobile or a jackhammer, together with its power source and auxiliary equipment.
机械系统用来工作的系统或装置，如汽车或手持式凿岩机，包括其动力源和辅助设备。
A system or device for doing work, as an automobile or a jackhammer, together with its power source and auxiliary equipment.
机械系统：用来工作的系统或装置，如汽车或手持式凿岩机，包括其动力源和辅助设备。
However, the auxiliary lock is not equipped with tow haulage equipment, so double lockage tows require special pull boat assistance.
但是，辅助船闸没有牵引设备，因此双闸拖轮需要有特殊的牵引船协助。
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