Learned from shipyards in China, abrasives, fixtures, steel structures, high-level gas-protective welding, handle welding, argon arc welding, 10 years of drawing experience 国内在船厂学出师 国内做磨具 夹具 钢结构 可上高 会气保焊 手把焊 氩弧焊 10年图纸经验 电话：6265530333