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环焊
gen.	boxing
met.	girth welding
space	circumferential welding
tech.	circum-ferential weld; circum-ferential welding

环焊: 79 phrases in 15 subjects

Automobiles	1
Bridge construction	2
Chemistry	4
Electric machinery	1
Electronics	3
General	3
Hydroelectric power stations	1
Metallurgy	29
Nautical	1
Oil / petroleum	7
Rail transport	1
Space	4
Technology	19
Welding	2
Wind Energy	1