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Information × Registration Number 2107U000653, Article popup.category Thesis Title popup.author popup.publication 01-01-2007 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/17627 popup.publisher Вид-во СумДУ Description Problems of hermetic sealing have arisen in an extreme antiquity, when the primitive person has started to close up cracks in a cave. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/17627 popup.nrat_date 2025-05-12 Close