隧洞掘进
- 网络tunnel
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隧洞掘进
tunnel
在线词典--水电知识网-... ... spheric 球面三角学 tunnel 隧洞施工,隧洞掘进 centre drift tunnel 中心导坑隧洞掘进[法] ...
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The Discussion for the Compiling Method of Budget Estimation Quota for the Excavator Construction of Hydro Project
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