In this paper, the compositions, working principles and its advantages and shortcomings of automatic control system for a single-well pumping installation are presented.
本文介绍单井自动控制抽油装置的组成、工作原理及其优缺点。
Use of concrete pumping construction, pipeline installation to be straight and flat pad.
砼采用泵送施工，管道安装要顺直，并垫平。
In order to improve the counterbalance effect of pumping units, this paper represents a method of installation with forward offset counterweight.
为了改善抽油机的平衡调节，本文提出了平衡重前置的安装方式。
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