Linear error curve can be concavecurve, it could be a convex curve.
线性误差曲线可以是凹形曲线,也可以是凸形曲线。
2
This blade has a gentle, sloping convex curve to the point versus the concavecurve of the clip blade.
相对于回形刀刃的凹曲线而言,这种刀刃具有一条延伸到刀尖的、温和的凸斜率曲线。
3
Single CAM linkage mechanism can overcome the shortcomings mentioned above, however the new problem is that the mechanism can not generate the path which has concavecurve.