GB/T 39281-2020气体保护电弧焊用高强钢实心焊丝标准
英文:Wire electrodes,wires,rods and deposits for gas shielded arc welding of high strength steels GB/T 39281-2020介绍: 国家标准《...
英文:Wire electrodes,wires,rods and deposits for gas shielded arc welding of high strength steels GB/T 39281-2020介绍: 国家标准《...