“classification of gaseous mines”的概念、定义、翻译、参考文献-科学参考

单词	classification of gaseous mines
释义	classification of gaseous mines Encyclopedia 工学瓦斯涌出释 classification of gaseous mines瓦斯矿井等级根据矿井的相对瓦斯涌出量和涌出形式划分的矿井级别。
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