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口罩的不同标准

民用口罩

非医用一次性口罩/医用口罩/医用外科口罩

NIOSH

N95, Surgical N95, N99, N100
R95
P95, P99, P100

FFP/Filtering Facepiece

FPP1, FPP2, FPP3

KN

KN95, KN99, KN100

KF/Korean Filter

KF94, KF99