[Class : 37] Construction Services Including Building Construction Supervision, Building Sealing / Damp Proofing, Construction And Maintenance Of Pipelines, Construction Of Energy And Power Generating Installations Being Structures, Construction Of Energy And Power Generating Installations Being Power Plant Structures, Construction Of Power Plants, Construction Of Infrastructures, Construction, Repair And Maintenance Of Power Plants, Building Construction; Installation And Repair Services Including Laying Of Cable, Machinery Installation, Maintenance And Repair, Rental Of Battery Chargers, Repair Of Power Lines, Services Of Electricians, Erection, Installation, Maintenance And Repair Of Windmills, Wind Power Plants, Wind Turbines And Other Wind Operated Machines Mining Extraction, Oil And Gas Drilling Including Drilling Of Wells;