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关注：1
2013-05-23 12:21
求翻译：摘 要：铁矿等非煤矿山的硬岩井巷开拓，硬岩爆破问题是制约建井速度的关键因素，是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
摘 要：铁矿等非煤矿山的硬岩井巷开拓，硬岩爆破问题是制约建井速度的关键因素，
问题补充： |
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2013-05-23 12:21:38
Abstract: Iron ore and other non-coal hard rock mine roadway development, blasting hard rock wells that hinders the construction of a key factor in the speed,
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2013-05-23 12:23:18
Summary: iron ore, and other non-coal mines in pioneering hard rock dajing lane, hard rock blasting issue is a key factor constraining the Tseng speed,
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2013-05-23 12:24:58
Abstract: The iron ore and so on the non-coal mine hard crag well lane development, the hard crag demolition question is the restriction constructs the well speed the key aspect,
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2013-05-23 12:26:38
Abstract: the iron ores of non-coal mines, such as hard rock roadway development, hard rock blasting in question is a critical factor restricting the speed of construction,
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