Intended portrotation: Chinese main ports to Luanda. Other ports are also welcome but subject to inducement.
计划挂港顺序：中国主要港口至罗安达，其他港口取决于货量。
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
Compression process: with the rotor rotation, compression chamber volume decreases, the gas compressed with the compression chamber until the exhaust port to the forefront.