A common misconception is that classic style round parachutes are more stable and oscillate less than pull down apex ones.
一个常见的误解就是普通圆形伞的稳定性比下拉顶部的圆形伞好。
APEX : The common point on the axis of a bearing where angular lines of each of the various tapered roller surfaces meet.
顶点：轴承中心线和圆锥轴承滚子表面延长线的交点。
APEX : The common point on the axis of a bearing where angular lines of each of the various tapered roller surfaces meet.
顶点：轴承中心线和圆锥轴承滚子表面延长线的交点。
应用推荐