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单词 fresnel lens
释义
Fresnel Lens
nnoun.artifactlens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
Part Holonyms:headlamp headlight searchlight
Hypernyms:lens lens system lense
Inherited Hypernyms:fresnel lenslensoptical devicedeviceinstrumentalityartifactwholeobjectphysical entityentity
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