Petroleum drilling and production specialized equipment manufacturing; Petroleum drilling and production specialized equipment sales; Special equipment sales; Steel rolling processing; Plastic product manufacturing; Rubber product manufacturing; Mechanical and electrical equipment manufacturing; Environmental protection specialized equipment manufacturing; Intelligent robot research and development; Intelligent instrument manufacturing; Industrial control computer and system sales; Special operation robot manufacturing; Software development; Metal surface treatment and heat treatment processing; New material technology promotion services; Mechanical equipment leasing; Housing leasing; Professional cleaning, washing and disinfection services; Petroleum and natural gas technical services; Technical services, technical development, technical consulting, technical exchange, technology transfer, technical promotion; Goods import and export; Renewable resource recycling (excluding production scrap metal); Renewable resource processing; Renewable resource sales; Metrology technical services; Terminal metering equipment sales; Standardization services; Electroplating processing; Production scrap metal recycling; Non-residential real estate leasing; Marine engineering design and module design and manufacturing services; Non-ferrous metal rolling processing; Coating equipment manufacturing; Terminal metering equipment manufacturing; Furnace, melting furnace and electric furnace manufacturing; Furnace, melting furnace and electric furnace sales; Motor vehicle repair and maintenance; Auto parts research and development; Auto parts remanufacturing; Auto parts and accessories manufacturing; Auto parts wholesale; Auto parts retail; Automobile sales. Licensed items: Special equipment manufacturing; Special equipment installation, modification and repair; Special equipment inspection and testing; Special equipment design; Catering services; Road cargo transportation (excluding dangerous goods); Construction engineering construction; Food production; Road motor vehicle production