输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

齿轮传动靠两个齿轮的轮齿（）来传动的。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

养路机械液压传动的工作原理是依靠密封容积的变化来传递运动，依靠油液内部的压力来传递动力。

链传动是依靠链轮轮齿与链节的啮合来传递运动和动力的，所以应属于（）。

带传动靠带与带轮间的（）来传动的。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。