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| 音响系统 | |||
| 声学系统; 放声系统 | |||
| 声音系统; 伴音系统 | |||
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sound system : 81 phrases in 19 subjects |
| Air defense | 1 |
| Archery | 1 |
| Automobiles | 7 |
| Aviation | 7 |
| China | 3 |
| Cryptography | 1 |
| Electronics | 13 |
| Finances | 3 |
| Fishery fishing industry | 1 |
| General | 2 |
| Multimedia | 2 |
| Nautical | 2 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 1 |
| Securities | 2 |
| Space | 5 |
| Technology | 24 |
| Telecommunications | 3 |
| United Nations | 2 |
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