Special equipment manufacturing; Special equipment design; Special equipment inspection and testing; Special equipment installation, modification, and repair; Road motor vehicle production; Inspection and testing services. General items: Special equipment sales; Construction machinery manufacturing; Construction machinery sales; Construction machinery and equipment leasing; Environmental protection special equipment manufacturing; Environmental protection special equipment sales; Technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Engineering and technological research and experimental development; Automobile sales; Security equipment sales; Fire-fighting equipment sales; Security equipment manufacturing; Fire-fighting technical services; Safety and fire-fighting metal product manufacturing; Leasing services (excluding licensed leasing services); Machinery and equipment leasing; Housing leasing; Transportation equipment leasing services; Import and export of goods; Import and export of technology.