[Class : 40] Water Sewage Treatement

[Class : 11] Sewage Treatment Plants, Sewage Disposal Plants, Sewage Purification Apparatus, Sewage Purification Installations, Waste Water Treatment Installations, Waste Water Treatment Apparatus, Waste Water Purification Installations

[Class : 11] Hollow Fibre Membranes For Filtration Used In The Purification Of Water And Aqueous Systems

[Class : 9] Instrumentation, Control And Automation Of Sewage And Water Treatment Process , Quantitative Measuring Of Process Parameters , Including Oxygen Concentration, Oxygen Consumption , Biomass Condition , Temperature And Flow, Chemical Dosimeters And Parts Thereof . Computer Hardware And Software For Automatic Control Of Water And Sewage Purification Installations ...