00580naa#a2200181#i#450# EN\\bibl\52870 20240901182111.7 2587-9936 20190625b2019####ek#y0engy0150####ca RUS RU Valve J. A. Fleming: background and its invention Journal article Sevastopol Federal State Educational Institution of Higher Education Sevastopol State University 2019 20 с. Journal article local . 621.37-621.39(091) RUS Pestrikov Viktor Mihaylovich rusjbpc.ru