梯形渠道的水力最优断面因为具有在过水断面面积一定时通过的流量最大的特点，是水利工程中一种常见的渠槽形式，它的断面设计需求解一个很复杂的高次方程。
Trapezoid channel is a common form in hydrological project with characteristic of maximum influx at a certain time, its section designing requires a complex equation of higher degree.
通过井下水力压裂方式将钻井废弃物回注到地下是目前海上油气开发钻井废弃物处理最优方法，不仅成本低，而且可以实现废弃物零排放。
The drilling waste being injected to underground by hydraulic fracturing is the optimal treatment method of drilling waste on offshore oilfield for its low costs and zero discharge of waste.
以矩形槽为例，分析求解渡槽最优纵坡，提出了渡槽最优水力要素的计算步骤和计算方法，所推导公式的方法同样适应于淤地坝无压输水涵洞、暗渠等类似工程。
In this paper, taking the rectangular aqueduct as the example, based on the analysis of the optimal solution aqueduct, the calculation steps and method of the optimal hydraulic elements are proposed.
结果表明：压力补偿式灌水器存在最优压力区间，在此区间内灌水器流态指数较小、水力特征曲线平滑；
The results show that pressure-compensating emitters have an optimal pressure range, in which the flow exponent is comparatively small and the water characteristic curve is smooth.
在同样水力条件下，最优园底直角断面的湿周是矩形最优断面的83.7%。
The wetted perimeter of this section is 83.7% of the rectangle in the same discharge, reach slope, roughness coefficient.
矩形流道断面以正方形为最优，且存在最优角圆，使单位长流道沿程水力损失最小。
The optimum passage section figure of rectangle is square, and the rectangle has 4 optimum comer circular arcs which make the hydraulic loss of friction loss of per unit length passage the least.
氟塑料是当今世界最优秀的耐腐蚀材料，美国威盾选用该材料生产的VTP型衬氟管道泵。 配合国内优秀水力模型和采用IS型离心泵之性能参数，在一般立式泵的基础上进行巧妙组合设计而成。
Fluorine plastic is one of the world's most outstanding corrosion resistant materials, American Standard VTP type selection of the materials for the production of fluorine pipeline pump.
氟塑料是当今世界最优秀的耐腐蚀材料，美国威盾选用该材料生产的VTP型衬氟管道泵。 配合国内优秀水力模型和采用IS型离心泵之性能参数，在一般立式泵的基础上进行巧妙组合设计而成。
Fluorine plastic is one of the world's most outstanding corrosion resistant materials, American Standard VTP type selection of the materials for the production of fluorine pipeline pump.
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