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Information × Registration Number 2114U002125, Article popup.category Thesis Title popup.author popup.publication 01-01-2014 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/45454 popup.publisher Sumy State University Description For many centuries scientists and inventors have tried to create perpetual motion machines, but even in those times they understood that the attempts to build such machines were vain and foolish. popup.nrat_date 2025-05-12 Close