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单词 refractive system
释义 refractive system
noun
: an optical system in which lenses instead of mirrors are used for focusing light, forming an image, or changing the path of a beam of light by refraction; specifically : a mode of lighting in lighthouses by a central lamp surrounded by a combination of lenses — called also refracting system
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更新时间:2024/12/23 19:46:23