Mine machinery manufacture; sale of mine machinery; sale of mechanical parts, parts and components; processing of mechanical parts, parts and components; sale of mechanical equipment; manufacture of specialized equipment (excluding licensed professional equipment); sale of wind and electric tools; sale of hydraulic machinery and components; sale of instrument instruments; sale of special equipment; retail sale of hardware products; sale of metal materials; sale of communications equipment; sale of labour protection supplies; sale of chemical products (excluding licensed chemical products)