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使
变硬,硬化
tech.
harden
变硬,硬化:
61 phrases
in 15 subjects
Agriculture
2
Automobiles
2
Bridge construction
2
Chemistry
1
Electric machinery
1
Electronics
3
Engineering geology
1
Explosives and Explosive Ordnance Disposal
1
General
1
Metallurgy
21
Plastics
1
Space
3
Steel production
1
Technology
15
Wind Energy
6
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