Manufacturing of general equipment (excluding special equipment); sales of mechanical equipment; research and development of mechanical equipment; manufacturing of material handling equipment; sales of material handling equipment; manufacturing of pumps and vacuum equipment; sales of pumps and vacuum equipment; manufacturing of electronic components and electromechanical component equipment; sales of electronic components and electromechanical component equipment; manufacturing of rubber products; sales of rubber products; manufacturing of synthetic materials (excluding hazardous chemicals); sales of synthetic materials; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of hardware products; retail of hardware products; maintenance of electronic and mechanical equipment (excluding special equipment); repair of general equipment; repair of specialized equipment; manufacturing of metal structures; sales of metal structures; sales of metal materials; manufacturing of photovoltaic equipment and components; sales of photovoltaic equipment and components; metal surface treatment and heat treatment processing; steel rolling processing; manufacturing of metallurgical specialized equipment; sales of metallurgical specialized equipment; technical services, technology development, technical consultation, technical exchange, technology transfer, and technology promotion; road freight transport of general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and hazardous goods); manufacturing of metal cutting and welding equipment; metal cutting processing services.