轴线，可让物体围绕着作旋转运动的一个想像的直线或实际存在的部件(如轴)。
AXIS, an imaginary straight line or an actual physical component (such as an axle) around which a body can rotate.
事实上，大厅的使用沿着一条东西向的轴线，当用于展示或表演时可以面向舞台，但是作为宴会厅时则沿着南北轴使用。
Indeed, the hall is used along its a east-west axis, looking towards the stage, when used for shows or the performing arts, but is used along its north-south axis when used as a banqueting hall.
该引脚正好符合了扩锥孔的垂直轴的轴线，要么径向或切向轴表面。
The pin fits snugly in a reamed tapered hole that is perpendicular to the shaft axis and either radial or tangential to the shaft surface.
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