（）, 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（）.

I级应急响应现场指挥由事发省（区、市）通信管理局指挥为主的现场通信保障应急指挥机构组织、协调现场通信保障应急工作。

I级应急响应现场指挥由事发省（区、市）通信管理局指挥为主的现场通信保障应急指挥机构组织、协调现场通信保障应急工作。

工程车辆使用费是指通信工程施工过程中发生的机动车辆使用费。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

应急照射控制中的自愿原则是指（）。

应急通信保障VI级响应由相关市（地）级通信保障应急指挥机构负责组织实施。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。