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ITU-T L.21
New product
ITU-T L.21
Fire detection and alarm systems, detector and sounder devicesMore info
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 13.220.20 : Fire protection
|
| Number of pages | 11 |
| Year | 1990 |
| Document history | |
| Country | International |
| Keyword | CCITT L.21;ITU-T 21;21;ITU-T L.21 |