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| 21. | moment of rotation |
| 回转力矩 |
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| 22. | ellipsoidal of gyration |
| 回转椭球 |
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| 23. | gyratory milling |
| 回转粉碎机 |
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| 24. | rotary valve body |
| 回转阀体 |
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| 25. | gyroscopic compass |
| 回转罗盘 |
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| 26. | swivelling propeller |
| 回转螺旋桨 |
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| 27. | gyrostatic stabilizer |
| 回转稳定器 |
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| 28. | gyration vector |
| 回转矢量 |
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| 29. | isolated pillar crane |
| 回转起重机 |
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| 30. | rotary valve seat |
| 回转阀座 |
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