它是外花键的齿根圆，和内花键的内圆(齿顶圆)。
It is the root circle of the external spline or the inside circle (tooth tip circle) of the internal spline.
它是外花键的外圆(齿顶圆)，和内花键的齿根圆。
It is the outside circle (tooth tip circle) of the external spline or the root circle of the internal spline.
内花键的尺寸是固定的，外花键根据不同的配合采用不同的尺寸。
The internal spline is held to basic dimensions and the external spline is varied to control the fit.
应用推荐