JJG 297-1997
Verification Regulation of Standard Hardmetals Rockwell(A scale)Hardness Test Black (English Version)

Standard No.

JJG 297-1997

Language

Chinese, Available in English version

Release Date

1997

Published By

National Metrological Verification Regulations of the People's Republic of China

Latest

JJG 297-1997

JJG 297-1997 history

• 1997 JJG 297-1997 Verification Regulation of Standard Hardmetals Rockwell(A scale)Hardness Test Black