These methods set up a new pathway for the design of new pumping unit in automatically removing the pumping unit, driving principle and the forming balance weight.
所介绍的方法，在让井方式、驱动原理和配重形式等方面为新型地面采油设备的设计创出一条新路。
2
The land wheel has simple structure, low rotating slip ratio of driving operation and reliable driving, and has the function of automatically removing soil without sticking soil.
本地轮结构简单，驱动作业转动 打滑率低，驱动可靠，且具有自动清除泥土功能，不粘土。
3
Shanxi Automobile Delong F3000 not only improves vehicle technology but also meet the need of user to make money, removing the troubles back home on buying, drivingand update.