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to phrases
预钻
gen.
subdrill
bridg.constr.
preboring
eng.geol.
pre-bore
;
predrilling
预钻:
49 phrases
in 8 subjects
Drilling
13
Engineering geology
10
Explosives and Explosive Ordnance Disposal
1
General
2
Metallurgy
3
Oil / petroleum
3
Rail transport
2
Technology
15
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