Explanation : The birds were modeled as a set of bookmarks. Bookmark sticks are designed in the form of trees, and bookmarks are compatible with other bookmarks sets, but the background is different and you can feel a see of difference. Print the bookmark with the clip, fold it in half, and then iert the clip. You can also download this file from the link : Many other 3Dprinting files are in the "3DSangSangPortal". (3D想象门户网站) Everyone please come and download. :) All files are : 描述: 把鸟类改造成书签套装。书签是以树的形态设计的,书签和其他书签套装很好,但是背景不同,可以感受到异质感。书签和夹子一起输出后折成一半,夹上夹子使用。 此资料可在以下链接下载。 除此之外,很多3D打印资料都在“3D想象门户网站”上。 谁来下载吧:)都是安全的文件。