On the base of the constant removal rate of the metal material, the motion model of tangential point tracing grinding of Non-roundparts should be given respectively according to type of the parts.
基于恒金属去除率的原则，根据零件的特点分别建立了非圆零件切点跟踪磨削的运动模型。
2
The FUF welcomes new volunteers all year round and in all parts of its work.
“城市森林之友”（FUF）全年都欢迎新志愿者参与其所有工作。
3
The round workpieces are picked up by a vacuum gripper, transported a short way and set down on a small carrier, which conveys the parts back to the starting point.