Welde韦尔德weldv.焊接；使结合n.焊接；焊缝welding crafts焊接工艺welded variant焊接变形weld on bottom底焊welding ground工件引线,电焊地线,焊接地线welding repair堆焊修复welding puddle焊接熔池weld in nozzle焊入式喷嘴weld structure焊缝金属组织welding helmet焊工帽,焊工帽罩,电焊帽,焊工面罩weld flow mark焊接流痕