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useless_faq2006-05-28 04:32 pm
grafobot.livejournal.com) wrote in useless_faq2006-05-28 04:32 pmПлощадь ленты Мебиуса
А кто знает как измерить площадь ленты Мебиуса?
grafobot.livejournal.com) wrote in useless_faq2006-05-28 04:32 pm
no subject