paper printing and treating machine accessories, namely power operated printing cylinder cleaning machines and electronic control stations sold as a unit therewith; printer cooling machines and electronic control stations sold as a unit therewith, namely, refrigerating installations for cooling water and circulating the cooled water through cylinders of a printing machine or for cooling water and feeding it through a heat exchanger which cool air blown by a blower through the heat exchanger onto a printing machine cylinder to be cooled and/or for cooling offset-printing dampening water of a printing machine and feeding the offset-printing water to the printing machine; combined printing cooling and paper operating material supplying machines used to supply printing machines with cooling water and with cooled offset-printing dampening water and electronic control stations sold as a unit therewith; power operated printer cooling air machines including a water-air-temperature exchanger and at least one blower for blowing air through the temperature exchanger and onto a printing machine cylinder for cooling it and electronic control stations sold as a unit therewith; power operated gluing machines used to provide tracks of glue onto paper for connecting said paper with another piece of paper and electronic control stations sold as a unit therewith; power operated paper web catching machines used to catch the leading end of tearing paper web and leading it out of the paper web fed printing machine and electronic control stations sold as a unit therewith; power operated paper dampening/moistening machines used for automatically preparing dampening water and controlling its content and its temperature and feeding the controlled dampening water to an offset-printing machine and electronic control stations sold as a unit therewith