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| 21. | spherical shield |
| 球形屏蔽 |
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| 22. | spherical neighborhood |
| 球形邻域 |
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| 23. | spherical parabola |
| 球面抛物线 |
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| 24. | spherical washer |
| 球底垫圈 |
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| 25. | spherical point |
| 球面点 |
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| 26. | spherical radiator |
| 球辐射器 |
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| 27. | spherical pyramid |
| 球面棱锥 |
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| 28. | spherical union |
| 球面活接头 |
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| 29. | spherical raceway |
| 球面滚道 |
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| 30. | spherical accretion |
| 球对称吸积 |
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