选择高频焊工艺参数，主要包括电源频率、（）、输入功率、焊接速度及焊接时的顶锻压力等。

短波电台操作方法：打开电台稳压器电源开关，开电台电源开关，检查电台有关参数设置，按住（）按钮进行呼叫，将水情信息（编码格式或话报形式）用步话器报出，报完后关闭电台电源，关稳压器电源。

更换开关电源监控模块，需要设置哪些参数？

高频开关电源运行参数的设置只有在监控模块上操作才能完成。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

通信电源设备安装工程验收规范是通信电源设备安装工程（）等工作的技术依据。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。