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backhand welding
archit.	右向焊; 反手焊
plast.	右旋转焊接; 右向焊接; 反手焊接
tech.	后退焊 (接); 退焊; 反手焊 (接); 逆向焊; 后退式气焊; 后焊法; 向后焊; 右焊法; 反向焊 (接)
backhand weld
met.	反手焊接