Welders电焊工人weldv.焊接；使结合n.焊接；焊缝welder performance qualification test焊工技术鉴定试验Welding restoration of roller surface辊压机辊面的堆焊修复方法welding generator with splitting pole裂极式电焊发电机welding ring stirrups concrete column焊接环式箍筋混凝土柱welded reinforcement of nozzle opening接管开孔的焊接补强Welding data aquisition and processing焊接数据采集和处理welding residual stress and distortion焊接残余应力和变形welding wire containing copper content焊丝含铜量welding procedure qualification record焊接工艺评定Welding operation sequence optimization焊接作业顺序优化