| 1. | Pump efficiency and conversion methods for efficiency
泵及泵装置效率表达与换算 |
| 2. | A method to enhance rod pumping efficiency
一种提高有杆泵抽油系统效率的方法 |
| 3. | Overall pumping efficiency
喷油总效率 |
| 4. | Field use shows that the new tubingless oil production unit has the advantages of high pump efficiency , low cost and easy operation
现场使用情况表明，新型无油管采油装置具有泵效高、投资少及作业方便等优点。 |
| 5. | With the rapidly increasing awareness of pump efficiency , more and more attention has been paid to the appropriate design of pump sump
随着对水泵效率越来越高的要求，设计恰当的吸水室成为改善水泵性能和提高效率的必不可少的步骤。 |
| 6. | 3 . we study how to improve the pump efficiency in a double clad fiber laser . several traditional pumping methods are considered and the light propagation
其中双包层光纤的结构、内包层的形状、泵浦光入纤方式等是这项技术的关键所在。 |
| 7. | With the rapidly increasing awareness of pump efficiency , more and more attention has been paid to the appropriate design of pump sump
随着对水泵效率越来越高的要求，设计恰当的吸水池，减少旋涡的产生成为改善水泵性能和提高效率必不可少的步骤。 |
| 8. | A test system was developed and an l9 ( 3 ^ 4 ) orthogonal experiment design was used to test the pump efficiency under different flow rates , lifts , electric voltages and currents
并设计了试验系统，采用l9 ( 3 ^ 4 )正交试验，以离心式水泵效率为试验指标，进行了离心式水泵的流量、扬程、电压和电流的测量。 |
| 9. | The centrifugal pump for oilfield waterflooding and oil transfer worked with low pump efficiency owing to unstable load and its energy loss is fairly large
油田注水集输系统离心泵由于载荷经常变化，大多不能在其额定工况点工作，泵效低，且需要用泵出口阀调节流量，产生一定的泵管压差，造成较大的能量损失。 |
| 10. | The results show that some models with the bionic non - smooth working surfaces are very effective , with the pump efficiency enhancement of 3 . 45 % , that means its growth rate of 6 . 81 %
对比试验表明，在离心式水泵的有效工作流量范围内，某些仿生改形表面的模型具有十分明显的效果，效率提高最大为3 . 45 % ，最大增效率为6 . 81 % 。 |
