77921424
Jan 27, 2010
installation, maintenance and repair of wind energy systems; installation, maintenance and repair of systems for the utilization of solar energy or wind energy, of hydro-power plants, oil-fired or coal-fired power stations, gas turbine power stations, atomic energy stations, thermal power stations, co-generation power stations, pumped hydro facilities and compressed air power stations, and of heating, cooling, ventilating, and air-conditioning systems
Building Construction and Repair