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关注：1
2013-05-23 12:21
求翻译：对于中溶洞和大溶洞一般采用钢护筒施工法是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
对于中溶洞和大溶洞一般采用钢护筒施工法
问题补充： |
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2013-05-23 12:21:38
Steel casing construction method commonly used for in caverns and caves
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2013-05-23 12:23:18
As for the caves and the karst cave with a steel cover and general construction law
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2013-05-23 12:24:58
Use the steel regarding the limestone cave and the big limestone cave to protect the tube technology generally
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2013-05-23 12:26:38
Caves and karst cave in the General steel casing construction method
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2013-05-23 12:28:18
for caverns in a karst cave and the steel cover and general construction law;
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