垂直旋转 meaning in English

vertical turn

A mounting for astronomical telescopes that permits both horizontal and vertical rotation
经纬仪天文望远镜的底座，可以使望远镜水平和垂直旋转
Z test conditions for machining centres - part 2 : geometric tests for machines with vertical spindle or universal heads with vertical primary rotary axis vertical z - axis
多工位数控加工中心的试验条件.第2部分:带垂直主轴或带垂直旋转主轴通用头的机器的几何尺寸试验