GRAIN-TYPE FILTER
SMALKO VIKTOR E,SU, RADOSELSKIJ VLADLEN S,SU, LIMARENKO ANATOLIJ D,SU, BELOV VYACHESLAV ,SU, ZENKOVICH ALEKSANDR L,SU, SVERTILOV EDUARD A,SU
Year of Publication 07.01.1981
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Year of Publication 07.01.1981
Patent