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mei guo kuang ye ju 1964 1979 nian jian wa si yan jiu
Pages: 64
Year: Issue:  1
Journal: Safety in Coal Mines

Keyword:  煤矿安全瓦斯研究瓦斯危害矿业抽放瓦斯地面钻孔水平钻孔瓦斯处理爆炸事故;
Abstract: <正> 该书首先叙述煤矿安全情况及瓦斯危害。自1906年开始统计以来,煤矿井下死亡人数的10%是爆炸所造成的。最严重的年份是1907
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