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关注：1
2013-05-23 12:21
求翻译：某煤矿20109工作面回风顺槽超前探测是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
某煤矿20109工作面回风顺槽超前探测
问题补充： |
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2013-05-23 12:21:38
20109 face of a coal mine back to the wind along the groove of advanced detection
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2013-05-23 12:23:18
Some 20,109 surface coal mine in slot early detection wind
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2013-05-23 12:24:58
正在翻译，请等待...
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2013-05-23 12:26:38
20,109 in a coal mine working face air return roadway advance detection
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2013-05-23 12:28:18
Some coal mine 20109 working surfaces return to the wind to survey in advance along the trough
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