[Class : 37] To Undertake Infrastructure Development Works, Treatment And Disposal Of Sewage, Setting Up Of Underground Drainage Systems , Designing Techniques , Constructing, Erecting, Laying Down Any Building, Engines, Pumps, Sewers, Tanks, Drains, Channels, Installation, Maintenance, Consultation And Repair Of Sewage Treatment Plant, Water Treatment Plants, Effluent ...

[Class : 11] Water Coolers, Water Purifiers, Filters For Water Purifiers, Water Purifiers For Household Purposes, Electric Water Purifiers For Household Purposes, Water Conditioning Apparatus, Water Filtering Apparatus, Water Cooling Apparatus, Water Sterilising Apparatus, Water Heaters [Apparatus], Water Purifying Apparatus, Water Purification Apparatus, Apparatus For Filte...