标高时标注管道或建筑物（）的一种尺寸形式，标高有绝对标高和相对标高两种。

给水排水制图中的沟渠和重立流管道宜标注（）标高。

给水排水制图中的沟渠和重立流管道宜标注( )标高。

供热管道纵断面图上应标注地面的设计标高，可不标注地面的原始标高。

给水排水工程施工图中，室内工程应标注相对标高

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, 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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

压力管道是指，工作压力大于等于（）MPa的给排水管道。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。