An optical device that projects a virtual image of an object onto a plane surface, especially for tracing.
一种光学装置，可将物体虚像投影到一平面之上，多用于跟踪。
This machine changes the intrinsic grinding machine structure Its body and ground plank are an integral whole . So when fixing . it can be located on a plane surface only once.
节能球磨机改变了原有的磨机结构，是机体、底架一体化，安装时可一次性吊放在基础平面上。
A plane surface approximation method for image coding and its quad tree scheme are presented in this paper.
该文提出了一种平面逼近图像编码方法及其四叉树实现方案。
A plane surface approximation method for image coding and its quad tree scheme are presented in this paper.
该文提出了一种平面逼近图像编码方法及其四叉树实现方案。
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