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Time relay on transistors "Contrast", presumably since 1972, has been produced by the Tushino machine-building plant. ,86e6f450b8cc469628ba70bf2947b049Time relay "Contrast" is intended for semi-automatic determination of exposure times (lamp burning time in seconds) during contact or projection printing.,86e6f450b8cc469628ba70bf2947b049,null,ru,null,null,null,null