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to phrases
巷道掘进
hàngdào juéjìn
eng.geol.
driving of headings
tech.
drivage
;
head driving
(工程)
;
heading advance
巷道掘进
:
13 phrases
in 4 subjects
Architecture
1
Explosives and Explosive Ordnance Disposal
3
General
3
Technology
6
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