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Keyword [Planetary gear-ring]
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1. Theoretical Analysis And Design Of The Non-beam Pumping Unit Of Planetary Gear-ring Type
2. Design And Research Of The Swing Arm Mechanism Of Vertical Pumping Unit Of Planetary Gear-ring Type
3. Dynamic Simulation And Analysis Of Vertical Planetary Gear Ring Oil Pumping Unit In Emergency Situation
4. The Design Of The Gear Ring Slider Mechanism Of The Vertical Planetary Gear Ring Pumping Unit
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