When the tail water level is higher than the ground of a hydro-power plant, the repairing and safety of the plant will be affected without water seal in the tail gate.
当水电站尾水位高于厂房地平面时，如果尾水闸门不能止水，势必影响电站的检修和安全。
Since Gongzui Hydropower Station put into operation, the tail water level always threaten the flood control safety against pow er-house (in di cating powerhouse on the ground).
龚嘴水电站自运行以来，尾水位的抬高一直威胁着厂房(指地面厂房)的消防安全。
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；
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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