YD/T 691-1994
Quality grading criteria of automatic message switching equipment (English Version)
- Standard No.
- YD/T 691-1994
- Language
- Chinese, Available in English version
- Release Date
- 1994
- Published By
- Professional Standard - Post and Telecommunication
- Status
- 2009-12
- Latest
- YD/T 691-1994
YD/T 691-1994 history
- 1994 YD/T 691-1994 Quality grading criteria of automatic message switching equipment
