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| 基谐振动; 基本振动; 原振动; 基谐振动固有振动中频率最低的振动 | |||
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fundamental vibration : 9 phrases in 5 subjects |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Space | 2 |
| Technology | 4 |
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