A1 / A1 mini Dust Plug 2.0

用于A1 / A1 mini 单机版，只使用上方一个插口时，其余插口裸露，容易进灰，出于防尘和美观可使用该零件，塞住对其余三孔，避免进灰。Used for the A1 / A1 mini standalone version, when only the top socket is used, the remaining sockets are exposed and prone to dust ingress. For dust prevention and aesthetics, this part can be used to plug the other three holes to avoid dust ingress.2.0版本：修正了原先打印过程中易松动的缺陷。Version 2.0:Fixed the original printing process's easy-to-loosen defect.