Anonymous ID: f1b810 Oct. 30, 2020, 5:29 p.m. No.11367131   🗄️.is 🔗kun

>>11367082

They say that and yet you see lab people usog the N95 with diaphragm. N95 is a description of the filtering capacity. Having or not a diaphragm has nothing to do with the N95 classification.