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关注：1
2013-05-23 12:21
求翻译：原因, 一是由于隧道开挖后支护不及时, 隧道顶部落是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
原因, 一是由于隧道开挖后支护不及时, 隧道顶部落
问题补充： |
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2013-05-23 12:21:38
Reasons, one due to the excavation of the tunnel support in a timely manner, the top of the tunnel down
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2013-05-23 12:23:18
As a result, tunneling, the support is not timely, the tunnel top tribal
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2013-05-23 12:24:58
The reason, after one is because tunnel excavation supports and protects not promptly, the tunnel goes against the tribe
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2013-05-23 12:26:38
Reason is due to tunnel excavation support after untimely tunnel tribe
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2013-05-23 12:28:18
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