NF EN 1043-1,Destructive test on welds in metallic materials - Hardness testing - Part 1: Hardness test on arc welded joints $ K7 G2 F+ R& }! pNF A 05-152,Iron and steel products - Macroscopic examination by strong mineral acid attack! S: o( V$ {2 Z' p( \7 z9 ?0 b6 g% ]
NF A 05-150,Steel products - Micrographic examination techniques 4 y3 i- d. F+ k9 F; t5 P! i/ dNF A 05-165,Steel products - Manual point counting method for statistically estimating the volume fraction of a constituent with a point grid * s. M4 X; `5 B: v; L2 q $ V/ Q! ]8 w" J/ P9 a% P- ~0 g! Q请问这几个标准对应的国标是哪几个,谢谢了!!