ringn.戒指；环；圈；拳击场；马戏场；帮派n.铃声；钟声；电话；口气v.包围；环绕；形成圈v.打电话；回响；鸣响；按铃；听上去Ringebun.灵厄比(在挪威；东经 10º12' 北纬 61º30')

1. The vibration performance of cycloid ball planetary reducer was analyzed.
   分析摆线钢球行星传动减速器的振动特性。
2. Then in accordance with the design criteria and design theory designed toroidal worm reducer.
   然后按照设计准则和设计理论设计了环面蜗轮蜗杆减速器。