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Mehrfrequenz
| Tastenwahlblock
| Mehrfrequenz | |
| transp. environ. el. | multifrequência |
| Tastenwahlblock | |
| tel. | teclado |
| |||
| multifrequência | |||
| Mehrfrequenz: 6 phrases in 4 subjects |
| Communications | 3 |
| Electronics | 1 |
| Information technology | 1 |
| Telephony | 1 |