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| 周期性振荡 | |||
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| 周期性振荡动 | |||
| 周期性振荡 | |||
| 周期振荡; 周期振动 | |||
| 周期摆动; 周期性振动; 周期性振荡; 周期性波动 | |||
| periodic oscillations: 6 phrases in 4 subjects |
| Aviation | 1 |
| Information technology | 1 |
| Oil / petroleum | 2 |
| Technology | 2 |
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