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关注：1
2013-05-23 12:21
求翻译：年前, 我国的隧道支护主要采用木支架, 重大伤亡事是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
年前, 我国的隧道支护主要采用木支架, 重大伤亡事
问题补充： |
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2013-05-23 12:21:38
Years ago, the tunnel support with wooden supports, heavy casualties things
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2013-05-23 12:23:18
Years ago, my main support of the tunnel with wooden stand, major injury or death,
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2013-05-23 12:24:58
The year ago, our country's tunnel supports and protections mainly uses the bust peg, heavy casualty matter
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2013-05-23 12:26:38
Years ago, my tunnel support is mainly made of wood brackets, heavy casualties
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2013-05-23 12:28:18
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