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填充砂
archit.
heap sand
tech.
backing sand
填充
型
砂
met.
backing sand
填充 砂:
45 phrases
in 10 subjects
Architecture
1
Electronics
1
Engineering geology
3
Explosives and Explosive Ordnance Disposal
2
General
1
Metallurgy
2
Mining
1
Oil / petroleum
17
Rail transport
1
Technology
16
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