Weldner韦尔德纳weldv.焊接；使结合n.焊接；焊缝Weld line restraining method拼焊板welding processing parameter焊接工艺参数welding electronic parameter焊接电参数welding between pipe connect管口和筒体间焊缝welding seam auto-tracking焊缝跟踪welded and rolled tube joint焊胀welding technology standards焊接技术标准welding consumables-groove焊材-坡口welding-and-forming mill成型焊管机welding knowledge management焊接知识管理