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Keywords: Diffraction grating.jpg World's largest multilayer dielectric diffraction grating in 2005 世界上 大的多层电介质衍射光栅(2005年) en wikipedia Transfer was stated to be made by User GcG 2005-04-08 Deglr6328 wikipedia en PD-USGov Usc original upload log page en wikipedia Diffraction_grating jpg 2005-04-08 02 43 Deglr6328 400×266×8 35602 bytes <nowiki>World's largest multilayer dielectric diffraction grating PD-USGov </nowiki> Light Reflection gratings |