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31. | The top sleeps. |
| 陀螺定转。 |
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32. | electric gyrocompass |
| 陀螺罗经 |
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33. | precession of gyroscope |
| 陀螺旋进 |
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34. | gyro horizon |
| 陀螺地平仪 |
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35. | laser gyroscope |
| 激光器陀螺 |
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36. | Children love to spin tops. |
| 孩子们爱抽陀螺。 |
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37. | a gyroscopic clinometer |
| 陀螺式倾斜仪 |
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38. | gyro-magnetic compass |
| 陀螺磁罗盘 |
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39. | integrating gyrounit |
| 陀螺积分环节 |
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40. | gravity controlled gyro |
| 重力控制陀螺 |
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