DZ 21-1982
Carbide bit (English Version)
- Standard No.
- DZ 21-1982
- Language
- Chinese, Available in English version
- Release Date
- 1982
- Published By
- Professional Standard - Geology
- Latest
- DZ 21-1982
- Scope
- This standard applies to straight-shaped, three-edged, cross-shaped, X-shaped and ball tooth bits for impact rock drilling.
DZ 21-1982 history
- 1982 DZ 21-1982 Carbide bit
