NF EN 1043-1,Destructive test on welds in metallic materials - Hardness testing - Part 1: Hardness test on arc welded joints 2 c6 N6 O) i( y5 q" iNF A 05-152,Iron and steel products - Macroscopic examination by strong mineral acid attack - g! |1 F& b) _) |' t: tNF A 05-150,Steel products - Micrographic examination techniques0 S1 @0 ~+ V) n" S! {
NF A 05-165,Steel products - Manual point counting method for statistically estimating the volume fraction of a constituent with a point grid- ]$ B( } t" m# M# ]* Z# V
; s* d i& j) p6 g; d/ @& C& T |
请问这几个标准对应的国标是哪几个,谢谢了!!