F

Pneumatic Refuse Conveyers

Electrostatic Precipitators for Dust Collection and Recovery

Air Conditioners for Conditioning Air or Other Gases by Heating, Cooling, Humidifying, Dehumidifying, Heat or Moisture Exchange and Cleaning, and Channels and Ducts Enclosed in Such Apparatus; Heat Exchangers-Namely, Hot Air Furnaces, Air Heating and Cooling Coils and Induction Units; Fans, Blowers, Ventilators, Air Grilles, Air Valves, Air Dampers, Air Diffusers, Dry or Wet Filters or Separators; Air Dryers for Lumber, Veneer, Board Sheets, Cellulose, and Other Fibrous Materials, Paper Cardboard, Grain, and Flash-Drying Units, Pulp Drying Units, Utilizing Heat