dust-proof machine

例句：

1. 1. This dust-proof machine can effectively prevent the spread of dust in the workshop.
   这款防尘机能有效防止车间内灰尘的扩散。
2. 2.The company has invested heavily in developing a new dust-proof machine to improve production efficiency.
   该公司大力投资研发新型防尘机，以提高生产效率。
3. 3. The engineer tested the dust-proof machine before installing it in the factory.
   工程师在将防尘机安装到工厂之前对其进行了测试。