vertical up welding
... 返修焊rewelding 向上立焊vertical up welding 向下立焊vertical down welding ...
vertical upward welding
... vertical shaft 直井 vertical upward welding 向上立焊 vertical wedge cut 垂直楔形掏槽 ...
rewelding
... pressure thermit welding 返修焊 rewelding 向上立焊 vertical up welding 向下立焊 ...
vertical up position welding
... vertical working position 垂直工作位置 vertical up position welding 向上立焊 welding in vertical down position 向下立焊 ...