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| 31. | homocentric beam |
| 同心光束 |
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| 32. | a device for projecting a beam of light. |
| 用来投射光束的装置。 |
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| 33. | subject to refraction, as of a light beam. |
| 使遭受折射用来描述线偏振光束。 |
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| 34. | projection beam |
| 放映光束 |
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| 35. | coherence beam guidance |
| 相干光束引导|相干光束制导 |
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| 36. | contracted beam |
| 集中光束 |
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| 37. | Reference beam |
| 参考光束 |
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| 38. | beam attenuator |
| 光束衰减器 |
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| 39. | projecting beam |
| 投影光束 |
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| 40. | Beam ratio |
| 光束比 |
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