Flexi Rex KeyChain.小恐龙钥匙扣

The previous version of the keychain was too loose and thin, so a thicker keychain has been added to make it sturdy and reliable. Printing parameters and manual support have been added. Just print directly. Please make sure to keep the printing board clean and avoid sweating your hands. 前面版本钥匙环过于松薄，重新添加了更厚的钥匙环，坚固牢靠。 已经添加好打印参数和手动支撑。直接打印即可。 请务必保持打印板整洁，避免手汗。