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crank-balanced pumping unit
meaning in Chinese
曲柄平衡式抽油机
Related Words
cranking
crank auger
cranking claw
cross crank
crank effort
straight crank
inside crank
cranked wrench
crank starter
overhang crank
crank with circular web
crank wrist
crank-co ecting hydraulic motor
crank-co ecting oil motor
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