[Class : 11] Waste Water Treatment Plant, Sewerage Water Treatment Plant, Effluent Treatment Plant, Reverse Osmosis (R.O)

[Class : 37] Building Including Commercial, Residential, Dam, Bridges, Flyover, Highways, Roads, Water Pipelines, Water Storage Tanks, Stp, Wtp, Government Tendering, Mines Activities, Extraction, Exploration, Construction, Operation & Maintenance As Included Class 37.