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Author | ITU |
---|---|
Editor | ITU |
Document type | Standard |
Format | File |
ICS | 33.040.50 : Lines, connections and circuits
|
Number of pages | 27 |
Cross references | GB/T 11592 (1989), IDT |
Year | 1980 |
Document history | |
Country | Switzerland |
Keyword | CCITT X.20;ITU-T 20;20 |