On the basis of a large number of field data, the regression equations of displacement coefficient, down-hole power loss and surface efficiency for pumping wells are established.
本文以大量的现场测试数据为基础，建立了抽油机井排量系数、井下功率损失及地面效率的回归方程；
This article reviews the physics of angular momentum transfer and loss in optical pumping and spin-exchanging collisions.
评述了光抽运和自旋交换碰撞中角动量转移和损失的物理。
The innovative design of the automatic gas pipe effectively reduces the loss of water through evaporation and pumping to ensure that the valve can perform its best function.
独有自动气喉设计，能有效减低隔气内之水份被蒸发及抽干而失去防回流的功能。
An excellent pumping admixture was made up by use of FDN compounded with calcium lignosulphonate, retarder for controlling slump loss and water retaining admixture for reducing water segregation rate.
FDN与木钙复合，以缓凝剂控制坍落度经时损失，以保水剂降低混凝土泌水率，配制出混凝土坍落度经时损失较小、性能优良的多元复合泵送剂。
The test method of pressure loss, flow loss and frictional force loss etc. of the hydraulic pumping units is presented, from which the mechanical efficiency and volumetric efficiency are obtained.
给出了测取液压抽油机系统压力损失、流量损失以及油缸的摩擦力损失等的方法，并由此求出系统的机械效率与容积效率。
This paper presents that pumping power change of Nd: YAG laser will induce not only gain change but also loss change.
本文指出当连续YAG器件的泵浦功率变化时，不仅是器件增益发生变化，而且器件的损耗也同样发生变化。
The test results show that the fluid properties of paste mixes may be described in Bingham plastic fluids and the pumping pressure loss can be predicted with the theory.
结果表明：该充填膏体可以划归为宾汉姆流变体，用基于宾汉姆流变体理论的公式能够预计膏体输送过程中的泵压损失；
The flow regime, sediment deposition and the loss of head of two head tanks of the sewage pumping station with different dimensions are studied by using a hydraulic model test method.
采用水力模拟的方法对两个不同结构尺寸的污水泵站高位井的水流流态、泥沙淤积及水头损失等进行了模型试验。
Based on these, the mass loss rate, coherent length and pumping mechanism have been discussed and the results agree with the observations very well.
并讨论了质量流失、相干长度和抽运机制等问题，结论与观测符合。
The influences of the thermal lens effect on the oscillation beam radius and diffraction loss can be reduced by increasing the proportion of the end-pumping power.
提高端面抽运功率占有率，可在一定程度上减小热透镜效应对振荡光束尺寸和衍射损耗的影响。
The influences of the thermal lens effect on the oscillation beam radius and diffraction loss can be reduced by increasing the proportion of the end-pumping power.
提高端面抽运功率占有率，可在一定程度上减小热透镜效应对振荡光束尺寸和衍射损耗的影响。
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