DIN EN ISO 636:2017 焊接消耗品.非合金钢和细粒钢的钨惰性气体焊用焊条、焊丝和沉积物.分类(ISO 636-2017).德文版本EN ISO 636-2017
Welding consumables - Rods, wires and deposits for tungsten inert gas welding of non-alloy and fine-grain steels - Classification (ISO 636:2017); German version EN ISO 636:2017