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Mad O'Brien🎭🎩
@markzuckerberg
Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet glasses, shown here worn by U.S. Army soldier (USAWC photo)
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Bay 🎭
@bayyy
Innovative design for wartime gas protection 🎭
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