folded cylinder TR tube

例句：

1. 1.The folded cylinder is a useful tool for storing small items.
   折叠圆柱是一个有用的工具，用于储存小型物品。
2. 2. The TR tube is used to transport gases and liquids through the air.
   TR管用于通过空气运输气体和液体。
3. 3. The folded cylinder is easy to store and carry, making it ideal for outdoor activities.
   折叠圆柱易于存储和携带，使其成为户外活动的理想选择。