Machines for Slaking Lime; Machines for Manufacturing Carbon Dioxide, Comprising Compressors, Flow Meters, Pressure Regulating Valves, Flow Regulating Valves and Burners; Machines for the Manufacture of Ozone, Comprising Compressors, Air Coolers, Ozonators, High Voltge Transformers and Control Panels; Submerged Turbine or Paddle Mixers for Dispersion of Air, Carbon Dioxide or Ozone in Water, Waste Water or Sewage; Turbine or Paddle Mixers for Mixing or for Inducing Flocculation; Comminuters

Instruments-Namely, Rate of Flow Meters; Rate of Flow Controllers; Liquid Level Gauges, Pressure Gauges and Differential Pressure Gauges; System for Dispensing Chemicals or Their Solutions by Weight or Volume, Comprising Rotating Auger-Like Screws, Travelling Belts, Scales, Storage and Dilution Tanks, and Pumps; Signalling and Supervisory System for the Automatic Control of Water Treatment Systems, Comprising Switches, Indicating Lights, Electrical Relays, Time Switches, Programmable Controllers, Minicomputers and Panels and Boxes for Housing Them

Aerators for Water, Waste Water or Sewage; Filter Systems to Remove Suspended Materials, Oil or Other Contaminants from Water and Parts Thereof, Comprising Filter Vessels, Strainer Nozzles, Underdrains, Wash Troughs, Surface Wash Sweeps and Filter Media; Solids Contact Reactors for the Clarification, Color Removal and/or Softening of Water by the Use of Combinations of Lime, Soda Ash, Barium, Coagulants, Polymers; Ion Exchangers and Their Regeneration Systems, Comprising Exchange Vessels and Their Underdrains, Distributors, Collectors, Storage Tanks, Dilution Tanks, Chemical Transfer Pumps, Ejectors to Produce Vacuum, Piping and Valves; Reverse Osmosis Systems, Comprising Reverse Osmosis Membrane Modules, Pumps, Control Cabinets, Storage Tanks and Pumps for Module Cleaning Solutions, Storage Tanks with Pumps and Controls for Adjusting pH; Solids Contact Reactors for the Clarification, Softening, Phosphate Reduction, Metallic Ion Reduction, or Combinations Thereof of Water, Waste Water or Sewage; Screens; Clarifier Systems to Remove Suspended Materials by Sedimentation or Flotation or Combination of the Two, and Parts Thereof, Comprising Clarifiers, Skimmers and Air Saturation Tanks; Digester Systems for Wastewater or Sewage Sludges, Comprising Fixed or Floating Tank Covers, Gas Holding Tank Covers, Mixers and Heaters; Activated Sludge Treatment Systems, Comprising Vessels, Porous Diffuser or Turbine Dispenser Aeration Devices, Air Lifts, Sludge Removal by Circular Rake or Longitudinal Flight Type Clarifiers, Air Blowers or Parts Thereof; Grit Removers Employing Controlled Settling to Separate Grit from the Organics Carried by Wastewater or Sewage; Belt Type Sludge Dewatering Presses