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регулируемая частота | |||
переменная частота |
fréquence variable : 29 phrases in 13 subjects |
Astronautics | 1 |
Aviation | 2 |
Chemistry | 1 |
Computers | 1 |
Construction | 1 |
Electronics | 3 |
General | 1 |
Measuring instruments | 1 |
Mechanic engineering | 1 |
Medical | 1 |
Power electronics | 1 |
Radio | 12 |
Technology | 3 |