1. 旋转轴：旋转台 rotating platform | 旋转轴 rotating shaft | 旋转运动 rotary motion

2. 回转轴：rotating seal ring 旋转密封环 | rotating shaft 回转轴 | rotating sleeve 转动套

3. 旋转轴;转轴：rotating disc combined system 转盘式组合系统 | rotating shaft 旋转轴;转轴 | rotating spiral system 旋转式螺旋系统

4. 转轴：功率伺服器power servo gear | 转轴rotating shaft | 回转板rotary plate

noun

1. a revolving rod that transmits power or motion

Synonym: shaft