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关注：1
2013-05-23 12:21
求翻译：主采煤层；立井单水平开拓；放顶煤；采煤方法；中央并列式是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
主采煤层；立井单水平开拓；放顶煤；采煤方法；中央并列式
问题补充： |
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2013-05-23 12:21:38
Main Coal Seams; vertical shaft single-level open up; Caving; mining methods; central parallel
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2013-05-23 12:23:18
lijin MAIN UNIT coal seams; click on develop it; Level top coal; coal; central side-by-method
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2013-05-23 12:24:58
Host mining coal level; Vertical shaft single level development; Puts goes against the coal; Mining coal method; Central compound -like
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2013-05-23 12:26:38
The main minable coal; single-level development of the shaft; top; mining method in Central side-
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2013-05-23 12:28:18
正在翻译，请等待...
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