42 Design and development of and scientific research, testing and analysis in connection with, wind power plants, wind-operated machines, wind power generation systems, wind power collection systems, wind turbines, wind mills, turbines for power generation, vertical axis wind turbines, vertical axis wind mills, vertical axis wind power plants and other vertical axis wind-operated machines, horizontal axis wind turbines, horizontal axis wind power plants and other horizontal axis wind-operated machines, wind power propulsion systems except for land vehicles, and components, parts and fittings therefor; technical services in the nature of technical research and development concerning wind power plants, wind-operated machines, wind power generation systems, wind power collection systems, wind turbines, wind mills, turbines for power generation, vertical axis wind turbines, vertical axis wind mills, vertical axis wind power plants and other vertical axis wind-operated machines, horizontal axis wind turbines, horizontal axis wind power plants and other horizontal axis wind-operated machines, wind power propulsion systems except for land vehicles, and components, parts and fittings therefor; advisory, consultancy and information services relating to all the aforesaid services