RV-4 1975
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The time relay type "RV-4" specifically "RV-4-1 U4" was produced presumably since 1975. ,8caa42f5a9df53968033bf99609e44f6 Designed to turn on or off the load in the range of 1 ... 60 seconds. ,8caa42f5a9df53968033bf99609e44f6 You can connect a photographic enlarger lamp or signal device to the relay when performing dark work, etc. ,8caa42f5a9df53968033bf99609e44f6 ,null,ru,null,null,null,null
Information from collection of Valery Khartchenko