There exists a saddle type zone in the hydraulic moment curve of axial-flow pump blades which corresponds to the saddle zone of discharge-head characteristic curve of the pump.

轴流泵叶片水力矩随流量变化的关系曲线存在一个马鞍区，并与流量-扬程曲线的马鞍区相对应。

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Using the improved ECOM model and coupling the sediment transport equation, the impacts of change of river discharge and sea level on estuarine turbidity maximum zone are studied.

应用改进的ECOM模式，耦合泥沙输运方程，研究径流量和海平面变化对河口最大浑浊带的影响。

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For the industrial pollution sources locating in the zone of municipal wastewater collecting system, effects of instant or accidental discharge of chemical compounds must be assessed.

位于城市污水处理厂污水收集系统区域内的工业污染源，必须考虑其突发性或间歇排放的化学物质对污水处理的影响。

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