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单词 fresnel lens
释义

WordReference Random House Unabridged Dictionary of American English © 2024
Fresnel lens, 
  1. Opticsa large lens with a surface of concentric grooves of prismatic profile, used in automobile headlights, searchlights, spotlights, etc.
  • see fresnel 1840–50

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更新时间:2024/9/22 1:02:54