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| acoustic balance (分析固体火箭发动机燃烧不稳定性的一种方法) | |||
| balance of sound | |||
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声平衡 : 15 phrases in 7 subjects |
| Aviation | 2 |
| Electronics | 4 |
| Otorhinolaryngology | 1 |
| Shipbuilding | 2 |
| Space | 2 |
| Technology | 3 |
| Telecommunications | 1 |
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