Class 037
Construction and Repair Services
Boring of wells; Drilling of deep oil or gas wells; Drilling of wells; Installation of solar energy systems; Maintenance, installation and repair of electrical items and equipment; Maintenance and repair of gas installations and equipment
Class 039
Transportation & Storage Services
Distribution of energy; Storage of energy; Storage of thermal energy; Storage of gas; Oil distribution services; Gas distribution services
Class 040
Treatment & Processing of Materials Services
Production of energy; Electricity generation
