CJJ 20-1989
Technical level standard for workers of urban gardens (English Version)
- Standard No.
- CJJ 20-1989
- Language
- Chinese, Available in English version
- Release Date
- 1989
- Published By
- Professional Standard - Urban Construction
- Status
- Latest
- CJJ 20-1989
CJJ 20-1989 history
- 1989 CJJ 20-1989 Technical level standard for workers of urban gardens
