10月25日，郑智化的一条微博引爆了舆论，他用“没有人性”、“连滚带爬”这样极具冲击力的词描述了自己在深圳机场登机的经历，在他笔下，自己完全没有得到一个理想的“照顾”，自己轮椅与升降平台之间20厘米的高度差，让自己的尊严被踩的粉碎。

The acronym VNF stands for Vertices 'N' Faces. You have probably already come across the concept of vertices and faces when working with the OpenSCAD built-in module polyhedron(). A polyhedron() in it ...

One of the shape primitives you'll use most often in your OpenSCAD designs is the cube. Rounding the edges of cube-like objects impacts both the visual appeal and functional aspects of the final ...