Gas Mask and Respirator Wiki
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Overview[]

The KRV-M was a filter issued for the PRV-M that resembled the GP-7K filter and the EO.1.08.01. It is most commonly used with a PMK-style filter sock. It was most likely designed with a built-in pre-filter, and that would most likely be the layer with ‘532 В 702’ stamped on it. [citation needed]

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