Xi Anshengli Instrument Co., Ltd. (hereinafter referred to as Anshengli Instrument) mainly develops and produces laboratory instruments such as process electric signal calibrator and intelligent digital multimeter. The process electrical signal calibrator produced by the company is used for on-site debugging and calibration of thermal instruments in petroleum, chemical industry, metallurgy, electric power, national defense, military industry and other industries; Intelligent digital multimeter and other laboratory instruments are suitable for scientific research and experiments in scientific research institutes and universities.