A dust mask is a flexible paper pad held over the nose and mouth by elastic or rubber straps for personal comfort against non-toxic nuisance dusts.
DUST MASKS p20
Reusable Dust Masks
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Reusable Dust Masks
A dust mask is a flexible paper pad held over the nose and mouth by elastic or rubber straps for personal comfort against non-toxic nuisance dusts.
DUST MASKS p20