pollution control and wastewater treatment equipment, namely pulp and paper mill effluent treatment equipment for practicing effluent treatment processes, namely clarifiers, presses, activated sludge vessels, mechanical treatment vessels, anaerobic treatment vessels, chemical treatment vessels, sludge dewatering presses, pumps, valves, piping, and instrumentation, all sold as a unit only for use in pulp and paper mill effluent treatment equipment
Environmental Control Apparatusmaintenance of pollution control and waste water treatment equipment in the pulp and paper industry; and installation of pollution control and waste water treatment equipment in the pulp and paper industry
Building Construction and Repair