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to phrases
火花试验
cables
spark test
;
holiday test
鉴定钢材含碳量的
火花试验
tech.
spark test
火花试验:
15 phrases
in 9 subjects
Aviation
1
Chemistry
1
Electric machinery
1
Electronics
2
Explosives and Explosive Ordnance Disposal
1
Metallurgy
2
Plastics
1
Space
1
Technology
5
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