00580naa#a2200181#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200007100102210010800173215001100281608002700292675003000319700003400349856001500383EN\\bibl\5287020240901181916.7##a2587-9936##a20190625b2019####ek#y0engy0150####ca0#aRUS##aRU1#aValve J. A. Fleming: background and its inventioneJournal article1#aSevastopolcFederal State Educational Institution of Higher Education Sevastopol State Universityd2019##a20 с.##aJournal article2local##a. 621.37-621.39(091)zRUS#1aPestrikovgViktor Mihaylovich4#arusjbpc.ru