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The time relay on transistors "Contrast-M" was produced presumably since 1979 by the Tushino machine-building plant. ,86e6f450b8cc469628ba70bf2947b049The time relay is intended for semiautomatic dosing of exposures (the time of the photographic enlargement lamp burning) during contact or projection photo printing.,86e6f450b8cc469628ba70bf2947b049,null,ru,null,null,null,null