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清底
bridg.constr.
base cleaning
;
bottom cleaning
tech.
bottoming
;
cleaning of bottom
清底
:
81 phrases
in 20 subjects
Agriculture
1
Architecture
1
Automobiles
7
Bridge construction
4
Chemistry
1
China
1
Commerce
1
Drilling
5
Earth sciences
1
Economy
1
Engineering geology
1
Explosives and Explosive Ordnance Disposal
2
General
4
Hydroelectric power stations
1
International trade
1
Metallurgy
1
Navigation
1
Oil / petroleum
6
Rail transport
2
Technology
39
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