这个控制阀是一个堰式隔膜阀，在流体系统中形成一个堵塞点，需要经常进行维护。
This control valve is a weir diaphragm valve and has created a clogging congestion point in the flow system that requires constant maintenance.
文中介绍了无顶式比例堰流量传感器的基本原理和结构，研究了无顶比例堰的流量特性。
This paper introduces the application of principle and structure of Open-top type proportion weir flow sensor and the features flow of this sensor.
论述了直角三角形堰式明渠流量计算问题，提出了一种高精度流量计算经验公式。
The calculation of right angled triangle weir-type open channel flowmeter is described. A high precision experiential flow calculating formula is given.
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