Computer software and hardware research and development; Production, processing, maintenance (* branch offices engaged in production, processing and operation within industrial parks) and sales of laboratory instruments and metal products; Business information consultation; Sales: overnight equipment, laboratory reagents (excluding dangerous goods), electronic products, teaching supplies and consumables. Projects that require approval by law can only be operated after approval by relevant departments.The representative products of Chengdu Leiyu Measurement and Control Technology Co., Ltd. include: standard gas mixer, standard gas distribution meter, standard gas dilution meter, standard gas dilution device, dynamic gas distribution meter, high-precision intelligent gas distribution system, gas dynamic gas distribution meter, gas dilution meter, gas dilution device, gas distribution meter and other series