（）, 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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

声级计使用前后要进行校准，通常使用（）或其他声级校准仪器进行声学校准。

测量道路交通噪声时，测量前后必须对声级计进行校准。要求测量前后校准偏差不大于（），否则测量无效。

声级计测量前后使用声校准器校准测量仪器的示值偏差不得大于（）dB？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。