[Grand-illusions]
http://www.grand-illusions.com/articles/homopolar_roller/
Opticke illusions, technologicke az kuzelnicke hracky, videa aj s vysvetlenim...
http://www.grand-illusions.com/articles/homopolar_roller/
Opticke illusions, technologicke az kuzelnicke hracky, videa aj s vysvetlenim...
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