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Electronic time relay "ERV" presumably since 1964 produced one of the Moscow factories. ,86e6f450b8cc469628ba70bf2947b049"ERV" is intended for automatic switching on and off of photographic magnifying devices at a given time. ,86e6f450b8cc469628ba70bf2947b049Exposure interval from 0.5 to 60 seconds. ,86e6f450b8cc469628ba70bf2947b049Load power 150 W.,86e6f450b8cc469628ba70bf2947b049,null,ru,null,null,null,null