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for subject
Metallurgy
containing
背面焊缝
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all forms
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in specified order only
Chinese
English
保护焊缝背面用气体
backup gas
焊缝的背面
里面,反面
underside of weld
焊缝背面
back of weld
背面
底焊
焊缝
back run
背面焊缝
封底焊缝
back weld
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