[Class : 40] Waste Water Treatment; Waste Water Reprocessing; Waste Water Treatment Services; Treatment Of Drinking Water, Service Water And Waste Water; Treatment Of Waste Water; Waste And/Or Water Treatment Services; Waste Water Treatment Services For Industrial Purposes; Treatment Of Waste Water For Pollution Control; Treatment Of Waste Water From Generating Operations & ...
[Class : 11] Waste Water Treatment Apparatus; Waste Water Treatment Installations; Waste Water Purification Installations; Waste Water Purification Units; Waste Water Treatment Tanks; Apparatus For Waste Water Purification; Waste Water Treatment Tanks For Industrial Purposes; Bioreactors For Use In Waste Water Treatment.