Dongguan Youyuan Electromechanical Equipment Co., Ltd. Air compressors, freezers, nitrogen generators, vacuum pumps, water pumps, gas storage tanks, filters and supporting equipment, hardware and electronics, and electromechanical products; Technical research and development, leasing, maintenance, and installation of electromechanical equipment; Indoor water and electrical installation engineering; Architectural engineering; Steel structural engineering; Landscape greening engineering; Import and export of goods or technologies (excluding goods and technologies prohibited by the state or involving administrative approval). (Projects that require approval according to law can only be operated with the approval of relevant departments)