JJG 831-1993
Verification Regulation of Green sand Mould Surface Hardness Tester for Castings (English Version)
- Standard No.
- JJG 831-1993
- Language
- Chinese, Available in English version
- Release Date
- 1993
- Published By
- National Metrological Verification Regulations of the People's Republic of China
- Status
- 2022-06
- Replace By
- JJG 831-2021
- Latest
- JJG 831-2021
JJG 831-1993 history
- 2021 JJG 831-2021 Hardness Testers for Casting Moulds of Sand
- 1993 JJG 831-1993 Verification Regulation of Green sand Mould Surface Hardness Tester for Castings
