File:PSM V15 D830 Collimator aperture.jpg
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PSM_V15_D830_Collimator_aperture.jpg (384 × 354 pixels, file size: 17 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:02, 14 August 2010 | 384 × 354 (17 KB) | Ineuw | {{Information |Description = The collimator aperture |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_15.djvu/830 |Date = 1879 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popular Science Mo |
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