Acceptable levels for breathing resistance of respiratory apparatus.
D003032:Coal Mining; D006801:Humans; D008433:Mathematics; D009787:Occupational Medicine; D005082:Physical Exertion; D011312:Pressure; D011482:Protective Devices / Q000592:standards; D012129:Respiratory Function Tests; D006113:United Kingdom; D012122:Ventilators, Mechanical / Q000592:standards*; D014939:Work of Breathing