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1·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.

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。

2·This paper also discusses bit parameter design to improve the economy of PDC bits, such as negative rake Angle and side rotation Angle.

本文还介绍了为提高复合片钻头经济指标的钻头参数设计问题，如负前角，侧旋角等。