machine parts; namely, acoustic silencers for electric motors, fans, ventilation units, cooling towers, blowers, compressors, internal combustion engines, turbines, jet engines, scrubbers, gas discharge units, air conditioning units, air discharge stacks, acoustical rainhoods and enclosures

Silencers for Air Conditioning Motors

DUCT SILENCERS FOR AIR CONDITIONING SYSTEMS

SYSTEM COMPRISED OF VESSELS, HOPPERS, FEEDERS, AIR LOCKS, VALVES, MOTORS, BLOWERS, CONDUITS, FILTERS AND MUFFLERS FOR PNEUMATICALLY CONVEYING DRY PARTICULATE MATERIALS SUCH AS POWDERS, GRANULES, PELLETS, CHIPS AND THE LIKE FOR INDUSTRIAL USES AND STRUCTURAL COMPONENTS THEREOF