Service in the nature of installation, repair, and maintenance of electrical systems and mechanical flue gas injection systems used in air pollution control, ammonia supply systems, and industrial gas conditioning systems; Rental of building equipment, namely, rental of electrical and mechanical systems in the nature of liquid and dry chemical feed systems used in air pollution control, ammonia supply systems, and industrial gas conditioning systems

Industrial Gas Conditioning System Comprising, Some or All of the Following: Blowers, Air Heaters, Sulfur or Sulfur Dioxide Storage Tanks, Pumps, Meters, Catalytic Converters, Sulfur Burners, Vaporizers, Injection Probes, Electrical Control and Display Means, and Parts Therefor

CUSTOM ENGINEERING AND DESIGN OF INDUSTRIAL GAS CONDITIONING APPARATUS AND SYSTEM AND CONSULTING IN CONJUNCTION THEREWITH; RENTAL OF SUCH EQUIPMENT