复合平衡式抽油机
compound-balanced pumping unit
曲柄平衡式抽油机
crank-balanced pumping unit
双井抽油机机架
the frame of double-well pumping unit
双驴头游梁式抽油机
twin-horse head pumping unit
游梁式抽油机
Walking-beam Pumping Unit
beam pumping unit
beam unit
beam pumper
beam pumping units
Beam-pumping Unit
Rocker-type oil pumping unit
beam-pump unit
beam-pumped machine
moving beam typed oil suction pump
Beam pump
Beam-balanced pump
travel-beam pumping unit
直线电机抽油机
linear motor pumping unit
柴油机机油冷却器
diesel oil cooler
lube oil cooler for diesel engine
发动机机油油槽区
engine oil sump compartment