от Уикипедия, свободната енциклопедия
Based on Image:Hourglass_drawing.jpg. Made using CorelDRAW X3 Trace as High quality image, smoothing 25, detail 80, 2 colors. ~~helix84 00:04, 31 October 2006 (UTC)
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This work was previously under Public Domain. It has been digitally enhanced and/or modified. This derivative work has been (or is hereby) released into the public domain by its author, helix84. This applies worldwide.
In some countries this is not legally possible; if so:
helix84 grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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Cropped from image at http://www.defenselink.mil/afis/editors/lineart_oct.html
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