JB/T 50031-1999
Quality classification of flameproof electric rock drills for mining (English Version)
- Standard No.
- JB/T 50031-1999
- Language
- Chinese, Available in English version
- Release Date
- 1999
- Published By
- Professional Standard - Machinery
- Status
- Latest
- JB/T 50031-1999
JB/T 50031-1999 history
- 1999 JB/T 50031-1999 Quality classification of flameproof electric rock drills for mining
