Application of beam pumping unit directly driven by permanent magnet integrated motor
Gong Yu, Zhou Heping, Hu Songhua, Zou Zhenghui, Jiang Jianzhong, Lin Xiangsheng, Zhang Huamin, Cheng Changqing
Acta Petrolei Sinica . 2018, (8): 955 -962 .  DOI: 10.7623/syxb201808011

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