In this paper, the compositions, working principles and its advantages and shortcomings of automatic control system for a single-well pumpinginstallation 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。
2
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。
3
In order to improve the counterbalance effect of pumping units, this paper represents a method of installation with forward offset counterweight.