JJG 661-1990
Verification Regulation of Flatness Interferometer with Isoclinic Circle fringe (English Version)
- Standard No.
- JJG 661-1990
- Language
- Chinese, Available in English version
- Release Date
- 1990
- Published By
- National Metrological Verification Regulations of the People's Republic of China
- Status
- 2005-03
- Replace By
- JJG 661-2004
- Latest
- JJG 661-2004
JJG 661-1990 history
- 2004 JJG 661-2004 Flatness Interferometer with Isoclinic Circle Fringe
- 1990 JJG 661-1990 Verification Regulation of Flatness Interferometer with Isoclinic Circle fringe
