shoebutton tube

例句：

1. 1. The shoe button tube is a small device that attaches to the back of shoes.
   鞋扣管是一种小型装置，安装在鞋子的背面。
2. 2. The shoe button tube is used to secure the laces of shoes together.
   鞋扣管用于将鞋子的鞋带固定在一起。
3. 3. The shoe button tube is an important part of a shoe, providing support and comfort.
   鞋扣管是鞋子的一个重要组成部分，提供支撑和舒适感。