This is a 3D printed tennisball. It can be assembly and disassembly easily, without out any screw or adhesion.
3D 打印的网球,不需要胶粘或者是任何螺栓,从而轻松地组装和拆卸。
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.