 |
| |||
| ac dialing; tone dialing; voice-frequency dialing | |||
| тональный набор номера: 15 phrases in 7 subjects |
| Communications | 2 |
| Electronics | 1 |
| Mass media | 1 |
| Programming | 1 |
| Technology | 3 |
| Telecommunications | 6 |
| Telephony | 1 |
|
| |||
| ac dialing; tone dialing; voice-frequency dialing | |||
| тональный набор номера: 15 phrases in 7 subjects |
| Communications | 2 |
| Electronics | 1 |
| Mass media | 1 |
| Programming | 1 |
| Technology | 3 |
| Telecommunications | 6 |
| Telephony | 1 |