DEVICE FOR DIRECTIONAL FILTERING PROTECTION WITH HIGH-FREQUENCY INTERLOCKING
DONI NIKOLAJ A,SU, YARIZ NIKOLAJ A,SU, NAUMOV ALEKSANDR M,SU, GELFAND YAKOV S,SU, LEVIUSH ALEKSANDR I,SU
Year of Publication 23.12.1981
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Year of Publication 23.12.1981
Patent