CJJ 23-1989
Technical level standard for workers of urban water-supply (English Version)
- Standard No.
- CJJ 23-1989
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Urban Construction
- Status
- Latest
- CJJ 23-1989
CJJ 23-1989 history
- 1970 CJJ 23-1989 Technical level standard for workers of urban water-supply
