在搜索引擎中输入检索式：“公司OR企业”表示检索结果（）

往复泵在操作中（）。

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.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

试述往复泵的操作要点和流量调节？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

化工操作单元设备中的塔有几种基本形式？应用原理是什么？

在石油化工操作中，输送（）的设备称为泵。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。