General projects: technical services, technology development, technical advice, technology exchange, technology transfer, technology promotion; manufacture of electronic specialized equipment; sale of electrical equipment; manufacture of general purpose equipment (non-special equipment); manufacture of electrical equipment; manufacture of plastics; manufacture of specialized equipment; manufacture of plastics equipment; sale of specialized equipment; sale of mechanical equipment; sale of machinery equipment; manufacture of gas, liquid separation and pure equipment; sale of gas, liquid separation and pure equipment subject to the approval of the relevant authorities; manufacture of specialized equipment (non-licensed professional equipment); manufacture of specialized equipment for environmental protection; sale of electrical equipment; manufacture of generic equipment (non-special equipment); manufacture of plastics; manufacture of specialized equipment; manufacture of plastics equi...