常見例句雙語例句Ultrasonic liquid level gauge used to real-time measure the upper level and tail level of the two sections , then the computer calculated average water level, gradient of water table and discharge;用超聲波液位計將測流渠段的上下游兩斷面水位實時測出，再用計算機分時段算出平均水位、水面坡降及流量； 返回 ultrasonic water level gauge