Weldenn.韦尔登(在德国;东经 10º40' 北纬 48º27')
weldv.焊接;使结合n.焊接;焊缝
welded condition焊接状态
welding tedhnics焊接工艺
welded pipe tube焊缝接管
welding training焊接培训
Welding blinkers焊接护目镜
welder rs health焊工保健
weldon's process
welded long rail焊接长钢轨
welding technics焊接工艺
welding capacity可焊性