[Class : 37] Construction Of Water And Wastewater Facilities; Order Intake And Brokerage And Consultancy Of Order Intake For Plant Construction; Construction; Providing Information Relating To The Construction Of Water And Wastewater Facilities; Consultancy Relating To Plant Construction; Construction Consultancy; Operation, Inspection Or Maintenance Of Building Equipment; Repair Or Maintenance Of Air Conditioning Apparatus; Repair Or Maintenance Of Burners; Repair Or Maintenance Of Boilers; Repair Or Maintenance Of Pumps; Repair Or Maintenance Of Freezing Machines And Apparatus; Repair Or Maintenance Of Water Pollution Control Equipment; Repair Or Maintenance Of Water Purifying Apparatus; Repair Or Maintenance Of Water Supply Apparatus; Repair Or Maintenance Of Chemical Plants; Repair Or Maintenance Of Hydroelectric Power Plants, Thermal Power Plants.[Class : 42] Design Of Water And Wastewater Facilities; Architecture; Surveying; Design Of Water Treatment Facilities; Design Of Water Treatment Machines; Design Of Water And Wastewater Facilities And Purification Tanks And Consultancy Relating Thereto; Water And Wastewater Facilities Engineering Services; Water Treatment And River Purification Engineering Services; Chemical Plants Engineering Services; Engineering Services Relating To Hydroelectric Power Plants, Thermal Power Plants, Nuclear Power Plants And Other Electricity Plants; Designing Of Machines, Apparatus, Instruments [Including Their Parts] Or Systems Composed Of Such Machines, Apparatus And Instruments; Computer Software Design, Computer Programming, Or Maintenance Of Computer Software; Technical Advice Relating To Computers, Automobiles And Other Machines That Require High Levels Of Personal Knowledge, Skill Or Experience Of The Operators To Meet The Required Accuracy In Operating Them; Inspection Of Water; Providing Water Information; Inspection Of Drains And Gutters; Research On Building Construction Or City Planning; Providing Computer Programs.