Bearing inner ring (shaft circle) of the basic cylindrical hole or holes in the internal tapered cylinder or cone in the axis line access.

轴承内圈(轴圈)的基本圆柱孔或圆锥孔的内接圆柱体或内接圆锥体的轴心线。

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As indicated in the section on simple machines, a screw ACTS with a wedging action and consists of a circular cylinder (or truncated cone) with a helical groove in it.

如在简单的机器上的区段所指出的，一个螺丝钉以一个楔住行动行事而且有圆形圆筒(或者切断了圆锥体)与一螺旋状的在它里面的凹槽。

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If the axis of the cone (cylinder or plane) lies in the plane of the equator the aspect is transverse.

如圆锥(圆柱或平面)轴位于赤道平面内，则成为横轴。

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If the axis of the cone (cylinder or plane) lies in the plane of the equator the aspect is transverse.

如圆锥(圆柱或平面)轴位于赤道平面内，则成为横轴。

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