EN ISO 15614-12-2004 Specification and qualification of welding procedures for metallic materials-Welding procedure - 简版
wongyatwah
楼主
2008-02-20 15:52:20
EN ISO 15614-12:2004 Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 12: Spot, seam and projection welding