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问题详情

Before starting a reciprocating, steam-driven pump that has been idle for a period of time, you should （）.

A、open the steam line mot valve

B、drain the steam cylinder

C、close the steam cylinder drains

D、open the liquid cylinder drai

时间：2022-01-04 08:16 关键词：船舶辅助机械

答案解析

B

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