（）, 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 （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

工程洽商一般分为（）洽商和（）洽商。

工程洽商分为技术洽商和经济洽商，工程资料中只对技术洽商进行存档。

工程洽商分为（）和经济洽商两种。

工程洽商分为技术洽商和经济洽商，工程资料中只对技术洽商进行存档。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。