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31. | valve spring surge |
| 汽门弹簧颤动 |
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32. | flutter computer |
| 颤动计算机 |
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33. | A trembling or shaking. |
| 颤动,悸动 |
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34. | chatter of brushes |
| 电刷的颤动 |
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35. | The act of pulsating. |
| 颤动的行为 |
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36. | vibratile spine |
| 颤动小棘 |
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37. | an unsteady voice. |
| 颤动的噪音 |
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38. | airplane flutter |
| 飞机颤动干扰 |
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39. | flutter checker |
| 颤动检验器 |
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40. | broad band random vibration |
| 宽带随机颤动 |
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