Industrial automation control systems, thermocouples, thermal resistors, flow transmitters, level indicators, display control instruments, thermal automatic calibration systems, pressure automatic inspection systems, electric actuators, wires and cables, cable trays, instrument control cabinets, instrument pipe valves, valve research and development, production, sales, and technical services; Instrument complete equipment, capacitive pressure transmitters, intelligent pressure calibrators, vortex flowmeters, electromagnetic flowmeters, magnetic flap level gauges, diaphragm pressure gauges, electric contact pressure gauges, precision pressure gauges, stainless steel pressure gauges, steel, metal materials sales, house leasing; Sheet metal fabrication and design; Export business of the company’s own products and technology, and import business of machinery, equipment, parts, raw materials, and technology required by the company, except for goods and technologies restricted or prohibited by the state. Permitted items: Technical import and export; General items: Power facility equipment manufacturing; Power distribution switchgear equipment manufacturing; Mechanical and electrical equipment manufacturing; Instrument manufacturing; Instrument sales; Metal processing machinery manufacturing; General equipment manufacturing (excluding special equipment manufacturing); Urban greening management; Landscaping engineering construction; Road freight transport of general cargo vehicles with a total mass of 4.5 tons and below (excluding network freight and dangerous goods); Special machinery manufacturing for building materials production; Power facility equipment sales; Cement product manufacturing; Cement product sales; Power electronic component manufacturing; Power electronic component sales; Advanced power electronic device sales.