标题: EN ISO 15614-1-2012 [打印本页] 作者: liuyu1029 时间: 2014-6-16 09:14:31 标题: EN ISO 15614-1-2012
EN ISO 15614-1-2012 Specification and qualification of welding procedures for metallic materials -wekding procedure testing part 1 arc and gas welding of steels and arc welding of nickel and nickel alloys