炮眼利用率是指炮眼深度和爆破后的实际进度之比。

井下炮眼深度小于（）时，不得装药、爆破。

炮眼深度小于0.6m时，可以装药、爆破。

井下炮眼深度小于()时，不得装药、爆破。

煤矿井下爆破炮眼深度小于（）时，不得装药、爆破。

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。