@pei.liu: Do you believe water spray can remove dust? This dust collector needs no extra consumables and relies on no water pump, yet it can purify dust with high efficiency. How exactly does it work? Once the fan starts, it creates a pressure difference inside the machine just like human breathing in air. Under pressure, the water level drops rapidly. The moment airflow breaks through the water surface, massive splashes form instantly. Dust sticks to the water spray as if glued together and settles to the bottom of the equipment. The filtered air goes through double folded baffles for secondary purification, and the air finally discharged is so clean that you can breathe it directly.#DustCollector #enviromental #factory #polish #Malaysia