Design of Testing Fixture for the Distance between Oilhole and Shoulder of Piston Bush;
柱塞套油孔至肩胛距离检具的设计
Establishment of dynamic model for plunger gas lift;
柱塞气举动态模型的建立
Development and application of auto - compensation soft plunger pump;
自补偿式软柱塞泵的研制与应用
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