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butt welded tube
met. 直缝焊管
butt-welded tube
archit. 对接焊管
met. 直缝焊管
tech. 对口焊接钢管; 对焊钢管; 对缝焊管; 卷焊钢管
butt welded tube
: 3 phrases in 1 subject
Metallurgy3