File:Laser out photogate crop.jpg

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Laser_out_photogate_crop.jpg(543 × 475 pixels, file size: 14 KB, MIME type: image/jpeg)

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current23:59, 22 November 2019Thumbnail for version as of 23:59, 22 November 2019543 × 475 (14 KB)Ist155317 (talk | contribs)