（）, 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.

在计算实砌墙身时，应扣除单个面积在（）以上的孔洞所占的体积。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

砌墙砖按工艺不同，又分为（）。

砌墙砖按规格、孔洞率及孔的大小，分为（）。

砌墙砖试验方法（GB/T2542-2003）标准中砖的孔洞率测量，称量盲孔砖的悬浸质量时，有孔洞的面朝上。

砖按生产工艺分为哪两类？

砌筑墙体砖按其生产工艺分为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。