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关注：1
2013-05-23 12:21
求翻译：长平矿大采高工作面区段煤柱尺寸留是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
长平矿大采高工作面区段煤柱尺寸留
问题补充： |
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2013-05-23 12:21:38
Changping coal mine working face with large mining height coal pillar size
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2013-05-23 12:23:18
chobei mining the coal mining zones of high benches Martin size remain
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2013-05-23 12:24:58
The long even ore greatly picks the high working surface sector coal column size to remain
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2013-05-23 12:26:38
Changping coal mine working face with large mining height coal pillar size
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2013-05-23 12:28:18
Changping coal mine working face with large mining height coal pillar size
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