73227159
Aug 13, 1979
Sep 8, 1981
Cooling Tower Variable Speed Fan Motor Control, Electrical Motor Control Centers in the Nature of Low and Medium Voltage Switch Gears, and Industrial Fire Protection Equipment-Namely, Aerators, Foam Storage Controls, Foam Blending Stations, and Automatic Fire Protection Valves Operating by Electric Solenoid, Air or Liquid Piloting
Electrical and Scientific Apparatus