（）是矿井通风动力，用以克服矿井的通风阻力，促使空气流动。

矿井通风系统是指，向矿井各作业地点供给新鲜空气，排除污浊空气的通风网络、通风动力装置和通风控制设施的总称。根据主要通风机工作方式的不同，矿井通风方式分为（）。

矿井通风系统是指，向矿井各作业地点供给新鲜空气，排除污浊空气的通风网络、通风动力装置和通风控制设施的总称。根据主要通风机工作方式的不同，矿井通风方式分为( )。

Shutdown price（or point，or rule） 停业价格（或停业点、停业原则）

翻译：With Average or With Particular Average（WA or WPA）（）

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。