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| частота «звона» (ударного возбуждения) | |||
| частота "звона" (асинхронного двигателя); частота на кольцах (асинхронного двигателя) | |||
| частота вызова | |||
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ring frequency : 3 phrases in 2 subjects |
| Makarov | 2 |
| Technology | 1 |
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