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21. | hydraulic radius |
| 水力学半径 |
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22. | equivalent radius |
| 当量半径 |
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23. | fireball radius |
| 火球半径 |
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24. | radius of operation |
| 作用半径 |
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25. | metallic radius |
| 金属半径 |
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26. | hydrated radius |
| 水化半径 |
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27. | tactical radius |
| 战斗半径 |
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28. | radius of a circle |
| 圆周半径 |
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29. | geometrical radius |
| 几何半径 |
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30. | radius of sphericity |
| 球体半径 |
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