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Thread: Homemade Duckbill Mask, exceeding N95 specs.

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  1. 03-04-2020, 10:14 PM #1
    Cordite
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    Homemade Duckbill Mask, exceeding N95 specs.

    Just posting this here in case anyone are nifty with either a sewing machine or needle n thread.

    HEPA filters are everyday items in our households but they are serious kit. They were developed in the 1940s as a necessity of the Manhattan project to prevent escape of radioactive particles from reactor buildings.

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