说明：  UF911A 超声波流量量测系统是根据超声波的有关原理对流量进行测量的装置。文中对该 系统的原理、结构、功能和在工程应用中遇到的问题及其解决办法进行了简单介绍。
(UF911A ultrasonic flow measurement system is based on the principle of ultrasonic flow measurement devices. In this paper, the principle of the system, structure, functions and applications in engineering problems encountered and their solutions for a simple introduction.)