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The US Navy ND Mark IV Diaphragm Gas Mask was made in 1943-44 to replace the very similar mask...
This is supposed to be a general overview of the subject of respirators, aimed at collectors...
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|current||17:06, June 26, 2012||2,660 × 2,316 (1.92 MB)||Firebirdjp (wall | contribs)|
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