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Cheap color film and slide develop temperature control
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PostPosted: Thu Mar 17, 2016 1:02 am    Post subject: Cheap color film and slide develop temperature control Reply with quote

http://www.banggood.com/DC-12V-50-to-110-Temperature-Control-Switch-Heat-Cool-Temp-p-933303.html
https://www.youtube.com/watch?v=arkvnYYTSjg

plus an aquarium heater with these you can make thermal buffer in kitchen basin to developing tank.