UVA N21-AP Grinder. Electrical Data Pack with 90 electrical schematics, a hydraulic schematic, and "Functional Descriptions of Solenoid and ands Switches" and their use in Loading, Chuck Ejector, Jetsizer, Table, Face and Bore Feeds, Seat Feed, Oscillation, Bore Grinding, Face Grinding Slide, Face Dressing Slide, Dressing Units, Top Slide, Cross Slide, Coolant Valves, and Pressure Switches, etc. Also has an Electrical Spares List and a list of "Functional Descriptions".