[img]http://2.bp.blogspot.com/-Mry0nxUU74M/VGBy5Uta3pI/AAAAAAAACFg/B68sugnYIr4/s1600/MMR.jpg[/img]

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author Maciej Marian Marosz Poland
http://maroszphysics.blogspot.com/

[img]http://www.szkolarbis-meble.pl/images/1058-bryla-sztywna-gp-szkola-srednia.jpg[/img]