straightness of weir plate top 溢流堰顶面不平度
altitude of weir top 堰顶高程
top of weir
堰顶
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This paper introduces the application of principle and structure of Open-top type proportion weir flow sensor and the features flow of this sensor.
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。
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David Weir is right at the top of his game, while Shelly Woods is still developing.
BBC: Steve Cram column
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