Finally, the influence of frictional resistance factors on the controlled tensioned stress is discussed and the general principle and requirements of field measurement are presented.
最后讨论了摩阻系数对张拉控制应力的影响，提出现场测试的一般性原则和要求。
2
To calculate discharge port pressure, this article considers the influence on frictional pressure drop in the gas and liquid two-phase flow between rod and tubing owing to rotation of rods.
在计算排出口压力计算过程中，考虑了由于抽油杆柱旋转引起杆管环空气液两相流摩阻的影响。
3
The soil ESP influence on soil internal frictional angle is small.