It is the key study how to make sure the pressure distribution of liquid in the pump barrel and to study the pump valve-ball's movement to improve the systematic efficiency.
对有杆抽油泵泵阀运动规律的研究和确定抽油泵泵阀筒内液体压力的分布是提高抽油机井系统效率研究的关键性课题。
This paper points out that the electrochemical noise obey logarithmic normal distribution and inverse power law, and the electrochemical noise is caused by the systematic complex.
本文首次指出电化学噪声服从对数正态分布与反幂律，它的产生在于系统的复杂性。
For all the specimens, liquid phase separation structures were observed generally by DTEMand a systematic measurement of liquid droplet size distribution was carried out.
用DTEM观察了全部试样的液相分离结构，系统地测量液相小滴的粒度分布。
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