用oil pumping unit造句子，“oil pumping unit”造句

3、In this paper, analyzed the beam-Pumping unit's main problems of wasting energy and low efficiency in use and researched on a variety of new oil pumping unit status.

1、Influence of vibration load of oil pumping unit on the camber wear of rod tube and its prevention.

2、Governor oil pumping unit and hydraulic accumulator shall be tested and correct functioning of the system will be verified.