JJF 1247-1990
Superficial Rockwell Hardness Benchmark Operation Technical Specifications (English Version)
- Standard No.
- JJF 1247-1990
- Language
- Chinese, Available in English version
- Published By
- National Metrological Technical Specifications of the People's Republic of China
- Status
- 2010-08
- Replace By
- JJF 1247-2010
- Latest
- JJF 1247-2010
JJF 1247-1990 history
- 2010 JJF 1247-2010 Calibration Specification for Weighing Instruments for Mining Car in Motion
- 1970 JJF 1247-1990 Superficial Rockwell Hardness Benchmark Operation Technical Specifications
