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["甲醇の毎日一題2218.

2018-11-21View Original

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对于长期停车系统氮气置换合格的标准为(  )。 A、 氧气<0.5% B、 可燃气体连续两次分析<0.5% C、 连续二次氧气<0.5% D、 可燃气体连续两次分析<1% B
Reply #22018-11-21
B、 可燃气体连续两次分析<0.5% C、 连续二次氧气<0.5%
Reply #32018-11-21
B、 可燃气体连续两次分析<0.5%
Reply #42018-11-21
C、 连续二次氧气<0.5%
Reply #52018-11-22
B、 可燃气体连续两次分析<0.5%
Reply #62018-11-22
B、 可燃气体连续两次分析<0.5%

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