Development and sale of oil exploration equipment, drilling and mining equipment, mining equipment, hydraulic and pneumatic components, hydraulic system equipment, hydraulic oil pipes, high and low voltage electrical control equipment, electrical components, wires, cables, hardware and electrical power, instruments, electromechanical products (except automobiles) and ancillary products; Installation and technical service of electromechanical equipment; Maintenance and technical consultation of mechanical equipment; Operate the import business of raw and auxiliary materials required for production and operation of the Company; Operate the export business of our products except those prohibited and restricted by the state. (Projects subject to approval according to law may not be operated until approved by relevant departments)