ultrasonic flow meter短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 超声波流量计 Because of the request of accuracy and the performance of real time, this ultrasonic flow meter uses the special data processing chip and digital phase technology. 由于流量计对测量系统的精确性和实时性要求较高，所以采用专门的数据处理芯片和数字鉴相技术。 cnki