centering axis meaning in English

中心轴

Aerodynamic center axis
气动力中心轴
The biggest possible angle between a ray and the center axis . the maximum angle that a fiber optic cable accepts light for further transmission
射线和中心轴之间可能存在的最大角。是光纤电缆接收光进行进一步传输的最大角。
The differential pinions mounted on the legs of the spider revolve around the center axis of the spider as the differential case rotates
差速器小齿轮安装在方向节十字轴支架上，在差速器齿轮箱旋转时，它会绕着方向节十字轴的中心轴一起旋转。
Like the primary mirror , the eyepiece has an optical axis , and this axis should be aimed at the center of the main mirror for best performance ? though in practice it is the center axis of the focuser drawtube that you aim at the primary mirror
目镜和主镜一样也有光轴，光轴应该对准主镜的中心? ?尽管实际上，目镜的光轴对准的是调焦筒（相当于调焦座）的中心。