Multi-frequency tone signalling protocol for social alarm system
14
| Main Author: | |
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| Format: | |
| Published: |
London : British Standards Institution,
1991
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| Subjects: |
| Summary: | 14 |
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14
| Main Author: | |
|---|---|
| Format: | |
| Published: |
London : British Standards Institution,
1991
|
| Subjects: |
| Summary: | 14 |
|---|