The knob (1) has a cylindrical base with a center axis, where the knob is rotatable around the center axis.

所述手柄(1)具有柱状的基体，并且能够绕着柱状的基体的中心轴线旋转。

youdao

The knob (1) has a cylindrical base with a center axis, where the knob is rotatable around the center axis.

所述手柄(1)具有柱状的基体，并且能够绕着柱状的基体的中心轴线旋转。

youdao