Manual programming is inefficient when using CNC pipe cutting machine cuts intersection lines with welding groove.

使用数控切管机切割带焊接坡口的相贯线时，手工编程效率低下。

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An image with intersection lines between grating planes and a known objective plane can be captured by a digital camera.

将光栅投影到已知目标平面，通过数字摄影得到光栅平面与目标平面相交的光栅图像。

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Further, the visibility of intersection lines could be determined by projection model. The occlusion matrix made up for the lost depth information during projection.

引入遮挡矩阵存储遮挡信息弥补了投影降维后造成的深度信息损失。

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Both turn out traditional cheesesteaks to seemingly endless lines of hungry tourists and Philadelphia locals, with only an intersection and hordes of cheesesteak-eating loyalists between them.

BBC: Love, war and the Philly cheesesteak