yahoocomcn 发表于 2007-6-7 10:30:01

DIN EN ISO 6508-2:1999

ISO 6508-2:1999 Metallic materials - Rockwell hardness test Part 2: Verification and calibration of testing machines (scales A,B,C,D,E,F,G,H,K,N,T)

[ 本帖最后由 tdragonfu 于 2008-2-26 18:28 编辑 ]
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