（）, 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 （）.

配置螺旋箍筋的钢筋混凝土轴心受压柱其承载能力提高的原因是什么？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

跨度为4.8m的梁的上部没有配受压钢筋时，需配置两根直径不宜（）的架力筋

钢筋混凝土偏心受压力构件是实际工程中广泛应用的（）构件之一

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

钢筋混凝土结构主要是利用混凝土受拉、钢筋受压的特点。