Centrifugal fan condensers; Compressed air pumps; Counter-current swimming machines for use in swimming pools to enable swimming in place against an adjustable counter-current, featuring pumps, motor, and adjustable current director outlets; Fan belts for motors and engines; Fans for machine engines; Fans for motors and engines; Filters for cleaning cooling air, for engines; Gas diverters consisting of a pump, storage and refilling tank, pre-heater, vaporizer, recuperator, condenser and valve...