dust guard holder

例句：

1. 1.The engineer designed a new dust guard holder to improve the efficiency of the machine.
   工程师设计了一种新型的尘埃保护器，以提高机器的效率。
2. 2. The factory uses this dust guard holder to prevent dust from entering the production area.
   工厂使用这种尘埃保护器来防止灰尘进入生产区域。
3. 3. The new model of the dust guard holder has been introduced in the market, and it has received positive feedback from customers.
   新型尘埃保护器已经在市场上推出，并得到了顾客的积极反馈。