一种可以伸缩折叠的凳子，折叠后为一个圆柱体，把盖章向上拉起并向右转动，即可完成固定，建议使用PETG打印，可以有效提高强度和使用寿命。

A kind of stool that can be retracted and folded, folded into a cylinder, pull the stamp up and turn it to the right, you can complete the fixation, it is recommended to use PETG printing, which can effectively improve the strength and service life.