Main Products : Measuring equipment for the production of crude oil and refined oil and various chemical liquids; Develop and produce on-line calibration equipment; Sell self-produced products and provide related supporting services. All products are sold in China; Research and development of automation system, information technology and equipment, technical services; Measuring equipment testing, maintenance, installation services; Provision of labor services; The import and export business of various kinds of commodities and technologies (except the commodities and technologies whose import and export are restricted or prohibited by the state). (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments) Permitted projects: special equipment installation, renovation and repair; Construction project construction (for projects subject to approval according to law, business activities can only be carried out after the approval of relevant departments, the specific business projects shall be subject to the approval result) General projects: non-residential real estate leasing; Intelligent instrument manufacturing; Sales of intelligent instruments (except for items subject to approval according to law, independently carry out business activities according to law with business licenses)