electric actuators; electric valve actuators; electric drives for valves; electric regulators for valves; automatic controller; electric damper actuators, namely, control devices used in ventilating ducts to discharge the smoke for fire-fighting system; electric control device for use in damper operations; electric regulator device for use in damper operations; electronic controls, namely, control devices used in ventilating, air conditioning, refrigeration, energy, heating, and fire-fighting...

Electric valve actuators; Electric actuators; Electric damper actuators for ventilating