... backing groove of weld 焊缝反面坡口 weld backing 焊接衬垫 ; 焊缝衬垫 ; 焊缝垫 nonfusible weld backing 非熔性焊接背垫 ...
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... 对接缝衬垫 butt block 焊缝背衬垫 weld backing 衬垫 backing strap; bearing strip; gasket; insert; insertion; lining; bedding; spac ...
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backing weld 打底焊 ; [机] 底焊焊缝 ; 打底焊道
nonfusible weld backing 非熔性焊接背垫
backing groove of weld 焊缝反面坡口
weld with backing ring 背面垫环焊接
weld with backing strip 背面垫板条焊接
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