YDJ 11-1987
Specification for installation design of long-distance manual telephone exchange equipment (English Version)
- Standard No.
- YDJ 11-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Post and Telecommunication
- Latest
- YDJ 11-1987
YDJ 11-1987 history
- 1970 YDJ 11-1987 Specification for installation design of long-distance manual telephone exchange equipment
