试题与答案

采煤工作面回风流中瓦斯和二氧化碳浓度如何测定?

题型:问答题 简答题

题目:

采煤工作面回风流中瓦斯和二氧化碳浓度如何测定?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对

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