Eneral project: Manufacturing of gas compression machinery; Sales of gas compression machinery; Manufacturing of mechanical and electrical equipment; Sales of mechanical and electrical equipment; Sales of mechanical parts and components; Processing of mechanical parts and components; General equipment repair; Special equipment repair; Maintenance of electronic and mechanical equipment (excluding special equipment); Electrical equipment repair; Sales of chemical products (excluding licensed chemical products); Manufacturing of daily miscellaneous goods; Sales of daily miscellaneous goods; Optical instrument manufacturing; Sales of optical instrument; Manufacturing of instruments and meters; Sales of instruments and meters; Wholesale of automotive parts; Manufacturing of automotive parts and accessories; Metal material manufacturing; Sales of metal materials; Wholesale of hardware products; Hardware product manufacturing; Manufacturing of household appliances; Sales of household appliances; Sales of mechanical equipment; Special equipment manufacturing (excluding licensed professional equipment manufacturing); Manufacturing of specialized equipment for oil refining and chemical production; Sales of specialized equipment for oil refining and chemical production; Sales of electronic products; Manufacturing of electronic components; Manufacturing of other electronic devices; Manufacturing of refrigeration and air conditioning equipment; Sales of refrigeration and air conditioning equipment; Manufacturing of fans and fans; Sales of fans and fans; Sales of plug-in hybrid specialized engines; Manufacturing of pumps and vacuum equipment; Sales of pumps and vacuum equipment; Import and export of goods; Technology import and export. (Except for projects that require approval in accordance with the law, business activities shall be carried out independently with the business license in accordance with the law)