Nodular deposits in fabric filters.
D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D005374:Filtration / Q000379:methods*; D010316:Particle Size; D013784:Textiles
D000393:Air Pollutants; D000395:Air Pollutants, Occupational