Further frustration with the Chinese 3M Copy

Further frustration with the Chinese 3M Half Face Respirator copy/clone.
It is very hard to pressure check this mask meaning you can't be certain if you have a safe air tight seal with the mask on.
If the mask is pressurising properly then it probably is fine however I would feel uneasy about using it with harmful dusts etc.

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Видео Further frustration with the Chinese 3M Copy канала Weaponsandstuff93