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The time relay "Don-103" has been produced presumably since 1983 by one of the Rostov factories (P / Y). ,86e6f450b8cc469628ba70bf2947b049Time relay "Don-103" is designed to turn on the lamp of the "Don-103" magnifier or any other for a pre-set exposure time of photographic paper, from 0.1 to 99.9 seconds.,86e6f450b8cc469628ba70bf2947b049,null,ru,null,null,null,null