（）, 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。

外圆柱面轴线A对内孔轴线B的同轴度公差属于（）

位置公差中的定位公差分为位置度公差、同轴度公差和（）公差。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

位置公差是位置误差的最小允许值，包括平行度、垂直度、倾斜度、同轴度、对称度、位置度、圆跳动、全跳动8种。

常用位置公差包括平行度、垂直度、倾斜度、同轴度、对称度、圆跳动、全跳动等。