General projects: sale of electrical equipment, sale of mechanical equipment, manufacture of mechanical and electrical equipment, manufacture of wind machines, fans, installation of general machinery equipment, installation of equipment (other than special equipment), sale of general equipment (other than special equipment), sale of household appliances, manufacture of appliances, sale of refrigeration, air conditioning equipment, sale of metal materials, sale of new metal functions, sale of metal tools, development of metal products, sale of doors and windows, distribution of electronic appliances, sale of electrical equipment, sale of electrical and electronic appliances, sale of metal products, sale of electrical equipment, sale of electrical equipment, sale of electrical equipment, sale of electrical equipment, sale of electrical equipment, sale of electrical equipment, sale of electrical equipment, sale of electrical equipment, sale of equipment, sale of fire equipment, sale of...