Sales and maintenance of machine tools, switchgear, electrical equipment, hardware electromechanical, welding equipment, cutting equipment, construction machinery equipment, generators, woodworking machinery equipment, instruments and meters, valves, pipe fittings, labor protection supplies, hardware tools, welding materials, welding and cutting materials. (For projects that require approval according to law, business activities can only be carried out with the approval of relevant departments) General projects: import and export of goods; Technology import and export; Import and export agency (except for projects that require approval in accordance with the law, independently carry out business activities with the business license in accordance with the law)