通过对一种带有内螺纹的酒瓶盖的结构分析，阐述了采用大导程螺杆和螺母机构实现螺纹型芯自动旋转脱模的设计过程及其工作过程。
Through analyzing of a bottle cover structure with inner thread, a type of screw and nut with coarse pitch was applied to realize thread core demoulding automatically.
凸轮机构控制巨型液压机分配阀芯时，在不同的升程阶段对凸轮理论工作曲线压力角有不同的要求。
During different lift range phases when a CAM controls the distribution spool of a giant hydraulic press, the CAM's requirement for the pressure Angle of its theoretical working profile is different.
凸轮机构控制巨型液压机分配阀芯时，在不同的升程阶段对凸轮理论工作曲线压力角有不同的要求。
During different lift range phases when a CAM controls the distribution spool of a giant hydraulic press, the CAM's requirement for the pressure Angle of its theoretical working profile is different.
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