Gas masks of the army type may be worn when the resistance does not exceed 4 inches of water. However, the amount of work the wearer can do is reduced, unless the work does not require much physical exertion. The capacity of a man foranbsp;...
|Title||:||Final report of the committee, Chemical section, National safety council, on spray coating|
|Author||:||National Safety Council. Chemical Section. Spray coating committee|