@pei.liu: Why does this dust collector dare to open the exhaust outlet towards the interior? Many people are stunned at first glance. In fact, after entering, the dust is separated by a cyclone to remove coarse dust, and then intercepted by a filter cartridge. Even ultra-fine dust of 0.3 microns cannot escape, and 99.9% of the dust can be purified. When clean air is discharged from the outlet, it fully meets the indoor emission requirements, saving the trouble of external pipelines, occupying a small area, and not needing to replace the filter cartridge frequently#DustCollector#enviromental#factory#polish#Malaysia