When appropriate transducers are installed, it may be applied to the measurementofdistance, depth, average flow velocity and mass flow rate.
在配备相应的传感器后，可用以测量平均流速、流量及距离、深度等。
2
Interval - an interval scale is a scale ofmeasurement in which the distance between any two adjacent units ofmeasurement (also known as intervals) is the same, but the zero point is arbitrary.