ICS 25.160.20 J 33 GB 中华人民共和国国家标准 GB/T39281—2020 气体保护电弧焊用高强钢实心焊丝 Wire electrodes, wires,rods and deposits for gas shielded arc welding of high strength steels (ISO16834:2012,Welding consumables—Wire electrodes,wires, rods and deposits for gas shielded arc welding of high strength steels Classification,MOD) 2020-11-19发布 2021-06-01实施 国家市场监督管理总局 发布 国家标准化管理委员会