§ 39recommendation3 editions
Rockwell hardness machines
This Recommendation deals with the verification of machines used to test hardness using the Rockwell B, F, T, C, A, and N systems and subject to state metrological control.
RecommendationR 39Withdrawn
- Latest edition
- 2006
- First published
- 1977
- URN
- urn:oiml:pub:r:39