Linear quadtree medial axis transforms offer a compact and exact region representation.
线性四元树中轴变换是一种紧凑和精确的区域表示法。
To design and control the virtual axis drill point grinding machine, mathematical representation to describe the drill point configuration is badly needed.
要设计和控制虚轴钻尖刃磨机，首先要建立描述钻头的数学模型。
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