（）, 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 （）.

目前常用的打孔机的打孔直径一般约为（）厘米左右。

常见草坪管理机有（）、打孔机、松土机等。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

顶管机有（）等多种类型。

顶管机有（）等多种类型。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。