... ultrasonic water level gauge 超声波水位计 Ultrasonic noise level 超声噪声电平 ultrasonic liquid level meter 超声波液位计 ...
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ultrasonic digital water level gauge 超声波数字水位计
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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;
用超声波液位计将测流渠段的上下游两断面水位实时测出，再用计算机分时段算出平均水位、水面坡降及流量；
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