Manufacturing and sales of specialized environmental protection equipmentManufacturing of products, sales of plastic products, manufacturing of industrial automatic control system devices, sales of industrial automatic control system devices; Manufacturing of distribution switch control equipment: distribution sales: processing of mechanical parts and components, sales of mechanical parts and components; Plastic SCJDGLSales of control equipment, pumps and vacuum equipment; Sales of valves and cocks: sales of wires and cables: sales of fiberglass reinforced plastic products: sales of metal materialsConstruction, technical services, technical development, technical consulting, technical exchange, and technical resale: installation services for ordinary mechanical equipment; Professional design services