One effective way is preferred pump barrel and plunger of materials and surface treatment processes.

其中一个有效的方法就是优选泵筒和柱塞的材料和表面处理工艺。

The bending of pump barrel will not happen as low part fixed pumping piston going downward that only happens when it works in heavy oil well.

而泵筒下部固定泵柱塞上行时，泵筒不会发生弯曲，只是其柱塞在稠油井中下行时泵筒才会发生纵向弯曲。

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。

The pump barrel of the hand-press pump is arranged in a liquid medicine box, and the pressure storage barrel is usually arranged at the outer side of the liquid medicine box.

手压泵的泵筒设置在药液箱里，手压泵的储压筒一般设置在药液箱外。

Some experts predict oil prices will go as high as $100 a barrel, which could translate to roughly $4 a gallon at the pump by summer in some areas of the country, reports the Huffington Post.

由于近期中东局势的动荡，给美国已造成了很大的麻烦。 一些专家预测油价将会攀升至每桶100美元，赫芬顿邮报报道说这意味着在一些地区每加仑的油价将达到4美元。