可测量的位置参数有切削齿复合片的圆心坐标及负前角、侧偏角等。
Measurable parameters include the coordinates of the circle center of the cutter teeth compact and the compact's back rake Angle and side sway Angle.
划圆是通过直径片的端点沿圆周轨迹转动，其圆心的位置是固定的原理而实现的。
The end of diameter plate moves along the circumference trace and its circle center is fixed.
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