提出的内凹的盘铣刀铣可加工凹曲面又加工凸曲面。通过改变刀盘曲轴线与曲面的截线和刀盘半径有相同的曲率和曲率导数。
This paper presents a new method in which the disc cutter always has the same curvature and the curvature differential with that of the surfaces being machined.
杰瑞遭遇车祸，无名指断了一截。医生得知他的职业后，建议他在人造手指中安装一个U盘。
He lost part of his ring finger in a traffic accident and his doctor helped him fit a USB "finger drive".
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