File:Optointerrupter ex photo1.jpg

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Optointerrupter_ex_photo1.jpg(624 × 466 pixels, file size: 97 KB, MIME type: image/jpeg)

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current18:43, 28 July 2006Thumbnail for version as of 18:43, 28 July 2006624 × 466 (97 KB)Hwang (Talk | contribs)

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