coarse dust造句

• Cyclone collectors are used when coarser dust is generated, as in woodworking, metal grinding, or machining.
• People further from the source of the dust are more often exposed to nearly invisible, fine dust particles that they can unknowingly inhale deep into their lungs, as coarse dust is too big to be deeply inhaled.
• Ground control station is equipped with life-support system, consisting of air conditioner, heating unit, uninterruptable power supply, petrol generator, and ventilation unit with the possibility to purify intake air from coarse dust, chemical and radioactive substances.
• Direct imaging with the Hubble Space Telescope shows extensive dust clouds out to a radius of around 2000 astronomical units from the star, corresponding with a stream of fine dust ( composed of grains 5 nm in diameter ) associated with the star's stellar wind and coarser dust ( composed of grains with a diameter of around 0.14 祄 ) ejected periodically.