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。

Is there any free CAD programs that are any good? I need basic 3d modelling, but from there i am not sure what features i will need. I don't think i need more than the basic features, but have no clue ...

I'm trying to find a 3D CAD program to lay out some carpentry projects that I'm planning. Nothing super fancy, just things like speakers and possibly a table. Something that's relatively easy to use ...