DIN EN 14730-2:2019 铁路应用 轨道 铁轨的铝热焊接 第2部分:铝热焊工的资格、承包商的认可和焊缝的验收
Railway applications - Track - Aluminothermic welding of rails - Part 2: Qualification of aluminothermic welders, approval of contractors and acceptance of welds; German and English version prEN 14730-2:2019