3 ms·
(40,000 x 0.025) + (420 x 0.975) = 1409.5 ppm
by londons_explore 3y ago
(40,000 x 0.025) + (420 x 0.975) = 1409.5 ppm
- _flux 3y agoRight you are! I guess the two valves in working masks are then quite essential, and normal breathing masks better have as little extra space for air in them as possible.