[Class : 37] Building Construction, Building Construction Supervision And Repair; Building Maintenance, Building Renovation; Construction Of Oil Pipelines, Oil Pipeline Laying Services, Installation Of Oil Pipelines, Oil Pumping Services, Maintenance And Repair Services For Oil Pipelines, Installation, Maintenance And Repair Of Oil Separators, Construction Of Structures For The Production Of Crude Oil, Construction Of Structures For The Storage Of Crude Oil, Construction Of Structures For The Transportation Of Crude Oil, Construction Of Oil Pumping Stations; Extraction Of Oil And Gas; Construction Of Gas Pipelines, Gas Pipeline Laying Services, Installation Of Gas Pipelines, Maintenance And Repair Services For Gas Pipelines, Construction Of Structures For The Production Of Natural Gas, Construction Of Structures For The Storage Of Natural Gas, Construction Of Structures For The Transportation Of Natural Gas; Construction Of Water Pipelines, Water Pipeline Laying Services, Installation Of Water Pipelines, Water Pumping Services, Construction Of Water Pumping Stations, Maintenance And Repair Services For Water Pipelines, Construction Of Structures For The Storage Of Water, Installation, Maintenance And Repair Of Water Purifying And Filtration Systems, Construction Of Structures For The Purification, Filtration And Pumping Of Water; Oil Well Drilling, Drilling Of Gas Wells, Water Well Drilling; Installation, Maintenance And Repair Of Power Plants And Power Grids, Installation, Maintenance And Repair Of Power Generating Apparatus And Installations; Maintenance And Repair Of Uninterruptible Power Supplies; Erection, Installation, Maintenance And Repair Of Wind Turbines, Wind Stations And Other Wind Powered Machines; Aviation Infrastructure Construction, Building Construction For Aviation Infrastructure Projects; Construction Of Plants, Construction Of Industrial Plants, Construction Of Power Plants; Vehicle Fueling Services, Aircraft Fueling Services; Erection Of Prefabricated Buildings And Structures; Installation Of Fire Extinguishing Apparatus, Fire Alarm Installation And Repair; Installation, Maintenance And Repair Of Electrical And Electronic Apparatus And Equipment; Road Paving; Property Development Services [Construction], Advisory And Consultancy Services Relating To Property Development, Installation Services, Interior Decoration, Installation And Repair Of Electric And Electronic Appliances, Factory Construction.