GB/T 36234-2018钛及钛合金、锆及锆合金熔化焊焊工技能评定国家标准
英文:Qualification testing of welders for fusion welding ontitanium and titanium alloys,zirconium and zirconium alloys GB/...
英文:Qualification testing of welders for fusion welding ontitanium and titanium alloys,zirconium and zirconium alloys GB/...