General valve and cock manufacturing (excluding special equipment manufacturing); valve and cock sales; valve and cock research and development; general equipment manufacturing (excluding special equipment manufacturing); general equipment repair; specialized equipment repair; industrial automatic control system device manufacturing; industrial automatic control system device sales; special equipment sales; leasing services (excluding licensed leasing services); technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; labor services (excluding labor dispatch); road freight transport for general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); goods import and export; technology import and export. Licensed items: Construction engineering construction; special equipment manufacturing; special equipment installation, modification, and repair; inspection and testing services.