摆线齿轮四杆机构是一类新颖的组合机构。
Cycloidal gear of four-rod mechanism is a species of novel combination mechanism.
建立下泵深度和抽油杆柱组合优化设计模型。
The optimal design model of downhole pump depth and rod string assemblage is set up.
建立下泵深度和抽油杆柱组合优化设计模型。
The optimal design model of downhole pump depth and rod string assemblage is set up.
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