This paper reveals some fuzzy phenomenon in sand control.
本文揭示了型砂控制中的模糊现象。
The sand control of oil well pump is very important for drilling-production system.
抽油泵防砂是钻采系统防砂的一个重要环节。
Series Sand control Pump have been developed to meet the requirement to solve the above problems.
为解决这些问题,我公司研制开发了多种适用于含砂井的特种抽油泵。
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