oil pumping unit

抽油机,Pumping... ... ) well pumping unit 抽油机 ) oil pumping unit 抽油机 ) Oil pump 抽油机 ...

输油泵... ... ) oil pump unit 输油泵机组 ) oil pumping unit 输油泵机组 ) rotor shaft of oil transfer pump 输油泵机组转轴 ...