There is great flow impact on the head of vanes at different condition, and it will affect the performance of pump system greatly, so the shape of the head of vanes should be improved.
叶片头部在不同的工况下均存在较大的水流撞击作用，适应来流不理想，这对泵的整体性能有很大影响，应予以修型。
Tom, you didn't have to undo your shirt collar where I sewed it, to pump on your head, did you? Unbutton your jacket!
汤姆，你往头上浇水的时候，不必拆掉我给你衬衫上缝的领子吧？把上衣的纽扣解开！
Centrifugal pump characteristic curve on the efficiency of the highest point known as the design point, a pump at the point corresponding to pressure head and flow of work under the most economic.
离心泵特性曲线上的效率最高点称为设计点，泵在该点对应的压头和流量下工作最为经济。
On condition that the process is fixed, we qualitatively point out that the temperature of spin head and temperature of spin pump are in direct proportion to the reduction of viscosity.
在一定的工艺条件下，定性指出了纺丝箱体温度、计量泵温度与粘度降成正比。
About the calculation on the discharge head provided to gas by pump, the paper presents three kinds of calculation methods, analyzes and compares the case calculation results.
在计算泵提供给气体的扬程时给出了三种算法，并对实例计算结果进行了分析比较。
Based on the theory of variety for researching a low head pump system, a new method to separate inlet conduit from pump system was put forward for measuring its hydraulic loss.
根据低扬程水泵装置的研究方法可以多样化的观念，提出了将泵站进水流道模型从水泵装置模型中分离出来单独进行水力损失测试的新方法。
The influences of geometrical parameters on low specific pump head should be emphasized on comprehensive influence.
低比转速泵几何参数对扬程的影响，应当侧重于综合影响的研究。
The main products are ve pump pump head distribution, injector, plunger, Valve and so on.
主要产品有VE分配泵泵头，喷油嘴，柱塞，出油阀等。
Submersible pump any of the provisions of the nameplate on the flow and head submersible pump is rated for use condition, the general is also more efficient use of the best point.
任何一台潜水电泵的铭牌上所规定的流量和扬程是这台潜水电泵使用的额定工况，一般也是使用效率较高的最佳点。
This paper explained the principle of constant-pressure water supply on the basis of characteristic curve of pipeline resistance and water pump head.
本文首先根据供水系统的管阻特性曲线和水泵扬程特性曲线，分析了恒压供水的原理；
On the base of real instance, the Transducer Velometer is recommended in large scale pump station and those of large energy waste and unit head change.
依据实例提出：对于大型泵站和耗电量大且装置扬程变化较大的泵站最好采用变频调速。
Tom, you didn't have to undo your shirt collar where I sewed it, to pump on your head, did you?
37“汤姆，你往头上浇水的时候，不必拆掉我给你衬衫上缝的领子吧？
Tom, you didn't have to undo your shirt collar where I sewed it, to pump on your head, did you?
37“汤姆，你往头上浇水的时候，不必拆掉我给你衬衫上缝的领子吧？
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