6 Pneumatics     60    Installation of pneumatic systems Generation of compressed air   Preparation of compressed air   Distribution of compressed air     65    Relays and magnetic valves Various relays   Magnetic valves     67    Individual-room control systems, VAV Room-temperature controller   Duct-temperature controller   VAV controller an transducer   Room-pressure controller     68    centair controller system Universal controller   Transducer   Pressure gauge     69    Accessories e/p and p/e converters, restrictors   Manual switches, control-pressure transmitters   Pressure-reducing set, time-lag relays   Test equipement, connecting pieces