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| |||
| audio oscillator | |||
| audio-frequency oscillator | |||
| audio frequency oscillator; audio-oscillator | |||
|
声频 振荡 器 : 6 phrases in 4 subjects |
| Aviation | 1 |
| Geophysics | 2 |
| Metallurgy | 1 |
| Technology | 2 |
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