In order to reduce the influence of gas on pumps and improve the pumping efficiency, a combined downhole gas-liquid separator is developed.
为了减少气体对泵的影响，提高抽油泵泵效，研制了井下复合式气液分离器。
Discusses the relationship between pumping speed and inlet pressure of an oil-sealed mechanical pump and the reason why its pumping efficiency drops down.
该文介绍了油封机械泵的抽速与入口压力的关系、泵抽气效率下降的原因，指出泵入口管道的流导和油蒸汽逆流是造成泵抽速下降的主要原因。
With appropriate choice of laser medium parameters, high pumping efficiency and good pump uniformity can be obtained for corner-pumped composite slab lasers.
通过选择合理的激光介质结构参数，角泵浦方式也能得到高的泵浦效率、较好的泵浦均匀性和激光输出。
The mechanism for improving the pumping efficiency with the technique is analyzed. Design procedures are proposed for the lifting string of fluid assistance.
分析了助流举升技术提高泵效的机理，提出了助流举升管柱的设计步骤。
Because the adopted N layers of rare-earth ion-doped ring-core optical fibers exist in a common central cladding region, the pumping efficiency is greatly improved.
由于采用的N层掺稀土离子环芯光纤存在一个共同的中心包层区，因此极大提高了泵浦效率。
The full-automatic vacuum box has the advantages of simple and reasonable structure, safe and convenient operation, high vacuum pumping efficiency and wide range of applications.
其结构简单合理、操作安全方便、抽真空效率高、适用范围广。
The utility model has simple structure, good technics, large flow, high oil pumping efficiency and a strong universality, which can be installed and used of the 70cc-250cc types of motorcar engines.
本实用新型结构简单、工艺性好、流量大、泵油效率高、通用性强，70CC- 250cc型号的摩托车发动机都可安装使用。
The utility model has simple structure, good technics, large flow, high oil pumping efficiency and a strong universality, which can be installed and used of the 70cc-250cc types of motorcar engines.
本实用新型结构简单、工艺性好、流量大、泵油效率高、通用性强，70CC- 250cc型号的摩托车发动机都可安装使用。
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