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| band compaction | |||
| band compression | |||
| bandwidth compression | |||
| frequency band compression | |||
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频带压缩 : 13 phrases in 8 subjects |
| Agriculture | 1 |
| Aviation | 2 |
| Electronics | 3 |
| General | 1 |
| Radio | 1 |
| Shipbuilding | 1 |
| Technology | 2 |
| Telecommunications | 2 |
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