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缩焦器
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缩焦器
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理学
缩焦器
释
focal reducer
缩焦器
在望远镜的焦点处配置的使焦距缩小的光学系统。
Astronomy
focal reducer
缩焦器
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urine directing toilet
urine examination
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urine of red colour
urine processing technique
uriniferous tubule
Uri Nissan Gnessin
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Uri Zvi Greenberg
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Urn with human skull ashes
urobilin
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Urochordata
urochordata
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