The penetration of dust through porous foam filter media.
D000395:Air Pollutants, Occupational; D003032:Coal Mining; D004391:Dust; D005374:Filtration / Q000295:instrumentation*; D055585:Physical Phenomena; D010825:Physics; D012134:Respiratory Protective Devices
D000395:Air Pollutants, Occupational; D004391:Dust