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[",[2] 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 2 2 1 2 2 2 ,[D D D D D D D D D D D

2017-02-14View Original

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多项选择题 1、冷换设备开车前进行热紧的作用有(  )。A、 避免材质变脆B、 防止压紧力下降C、 防止设备泄漏D、 提高换热效果 答:B,C
Reply #22017-02-14
1、冷换设备开车前进行热紧的作用有( BC )。A、 避免材质变脆B、 防止压紧力下降C、 防止设备泄漏D、 提高换热效果

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