YDJ 7-1984
Specification for installation design of crossbar system urban local telephone exchange equipment (English Version)
- Standard No.
- YDJ 7-1984
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Post and Telecommunication
- Latest
- YDJ 7-1984
YDJ 7-1984 history
- 1970 YDJ 7-1984 Specification for installation design of crossbar system urban local telephone exchange equipment
