6
Regulating accessories for water supply not for use in connection with plumbing, heating and cooling installations, namely, manually operated metal check valves for regulating the outflow of water or waste water; metal troughs for water and waste water treatment
7
Metal and plastic sludge pumps; agitators for circulating water and waste water; surface machine aerators; machine parts, namely, aerator rotors
11
Regulating accessories for water supply, namely, check valves for regulating the outflow of water or waste water for use in connection with plumbing, heating and cooling installations; Machines, mechanical devices and parts thereof, namely, waste water purification unites for the storage, treatment, aeration, conveyance and removal of water and wastewater as well as for screening and treatment of sludge in municipal water treatment; throttle, control and regulating devices for use in waste water purification of municipal water for the purpose of regulating flushing systems for rainwater holding basins and reservoirs, which are comprised of flushing chambers, flushing slides and metal valves, as well as control and regulating devices therefor, namely, screens, screen cleaners, coarse material grinders, surface aerators, underwater aerators, aeration rotors, and agitators; metal and plastic wastewater pumps
20
Regulating accessories for water supply not for use in connection with plumbing, heating and cooling installations, namely, manually operated non-metal check valves for containers for regulating the outflow of water or waste water; regulating accessories for water supply not for use in connection with plumbing, heating and cooling installations, namely, manually operated plastic check valves for regulating the outflow of water or waste water
37
Construction and construction planning of water treatment and purification plants, solid waste water treatment plants and other municipal infrastructure facilities; building construction services
42
Engineering consultation and evaluation services; architectural and engineering services
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