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Dust respirator is to be used as temporary substitute until dust control measures can be instituted or as protective means where dust control measures are impracticable, as in applying rock dust in bituminous coal mines; construction and mode of functioning; basic requirements; selection; fitting; maintenance.
Dust respirator is to be used as temporary substitute until dust control measures can be instituted or as protective means where dust control measures are impracticable, as in applying rock dust in bituminous coal mines; construction and mode of functioning; basic requirements; selection; fitting; maintenance.
Use of dust respirators in coal mines
U S Bur Mines -- Information Cir
Pearce, S.J. (author)
1950
6 pages
Report
English
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