Rotating the disc of the compound rest with an angle equal to half the apexangle of the cone.
将复式刀架盘旋转一个等于圆锥体顶角一半的角度。通过摇动复式刀架操纵柄手动提供进给。
2
Taking cordierite and topaz for example, the specific cone-apexAngle values are given, and the reason why the cone-apex angles are too small is analyzed.