气动平衡泵杆抽油机
air-balanced sucker-rod pumping unit
摩擦式智能抽油机
friction-type pumping unit
普通抽油机
conventional pumping unit
倾斜行程抽油机
slant stroke pumping unit
曲柄连杆式无游梁抽油机
crank-guide blue elephant
柔性抽油机
the flexible pumping unit
双井抽油机机架
the frame of double-well pumping unit
双驴头抽油机
double donkey headed oil suction pump
双驴头游梁式抽油机
twin-horse head pumping unit
摇块机构抽油机
beam rocker structure pumping unit
液压抽油机
hydraulic pumping unit
Hydraulic oil pumping units
hydraulic pumping units