7 AC variable frequency drives that are used to control small and medium-sized motors in applications such as manufacturing processes, HVAC and pumps; Alternating current servo motors; Drives for motors; Industrial surface treatment equipment, namely, vacuum plasma treatment systems comprised of a high frequency, high voltage generator, controls, and treatment chamber and structural parts therefor; Pneumatic controls for machines, motors and engines; Power transmission belts for machines, motors and engines used in industrial applications; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems being sold as a unit with manufacturing machines; Servo-drives for motors; Servo-valves; Starters for motors