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to phrases
top heading method
eng.geol.
顶部导坑法
top-heading method
tech.
上半断面开挖法
;
上半断面超前施工法
;
顶撑法
;
上导坑法
;
上导洞法
(开挖隧道)
;
上部超前掘进法
top heading method
:
7 phrases
in 4 subjects
Engineering geology
2
Explosives and Explosive Ordnance Disposal
1
Rail transport
2
Technology
2
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