Sekunda BRV-1 1979
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The highly stable proximity switch BRV-1 "Second" has been produced since 1979 by the Penza software "Electromechanics" plant "Schetmash". ,8caa42f5a9df53968033bf99609e44f6 ,null,ru,null,null,null,null
Documentation:
Information from collection of Valery Khartchenko