pleated sheet structure

例句：

1. 1. The engineerdesigned a pleated sheet to improve airflow in the room.
   工程师设计了一个褶皱的纸板来改善房间的空气流通。
2. 2.The company uses pleated cardboard for packaging products to reduce waste.
   该公司使用褶皱的纸板进行包装，以减少浪费。
3. 3. The new design uses pleated corrugated paper to make the product more durable and environmentally friendly.
   新设计使用了褶皱的波纹纸板，使产品更加耐用且环保。