Petroleum drilling and production special equipment sales; Petroleum drilling and production special equipment manufacturing; Wire and cable operations; Pump and vacuum equipment manufacturing; Pump and vacuum equipment sales; Environmental protection special equipment manufacturing; Environmental protection special equipment sales; Special equipment manufacturing (excluding licensed professional equipment manufacturing); Special equipment repair; Mining machinery manufacturing; Mining machinery sales; Marine engineering equipment manufacturing; Marine engineering equipment sales; Engineering and technical research and experimental development; Emerging energy technology research and development; Generator and generator set sales; General equipment manufacturing (excluding special equipment manufacturing); Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Electrical accessory sales; Pipeline transport equipment sales; Electrical equipment sales; Mechanical parts and components sales; Electronic special equipment manufacturing; Electronic special equipment sales; Motor manufacturing; Special equipment sales; Generator and generator set manufacturing; Power electronic component manufacturing; Power electronic component sales; Gas and liquid separation and purification equipment manufacturing; Gas and liquid separation and purification equipment sales; Intelligent control system integration; Industrial automatic control system device manufacturing; Industrial automatic control system device sales; Technical services, technical development, technical consulting, technical exchange, technology transfer, and technical promotion; Marine engineering platform equipment manufacturing; Marine engineering key supporting system development; Marine engineering design and module design manufacturing services; Marine energy system and equipment manufacturing; Security equipment sales; Security equipment manufacturing; Fire equipment sales; Mechanical equipment leasing; Hydraulic power machinery and component sales; Industrial engineering design services; General mechanical equipment installation services; Oil and gas technical services; Mechanical equipment research and development; Mechanical equipment sales; Electronic component wholesale; Electronic components and electromechanical component equipment sales; Automotive parts and accessories manufacturing; Hardware product manufacturing; Hardware product research and development; Hardware product retail; Hardware product wholesale; Electronic component retail; Power facility equipment manufacturing; Electrical machinery special equipment manufacturing; Power facility equipment sales; Rubber product sales; Metal product sales; Plastic product sales; Chemical product sales (excluding licensed chemical products); Packaging materials and product sales; Metal material sales; Special chemical product sales (excluding hazardous chemicals); Lubricating oil sales; Goods import and export; Technology import and export. Licensed items: Road motor vehicle production; Special equipment manufacturing; Electrical installation services; Wire and cable manufacturing; Special equipment installation, modification, and repair.