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| frequency distortions | |||
| frequency distortion | |||
| attenuation-frequency distortion | |||
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| frequency distortion | |||
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频率畸变 : 10 phrases in 8 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| General | 1 |
| Information technology | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
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