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back weld
auto. 密封焊道
chem. 封底焊道
met. 背面焊缝封底焊缝; 封底焊缝
oil 背焊缝
tech. 封底焊 (缝); 底焊缝; 背面焊
back weld: 6 phrases in 5 subjects
Architecture1
General1
Metallurgy2
Plastics1
Wind Energy1