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>The approval number on your mask should begin with "TC." The mask should also have a NIOSH logo printed on it. This image from the CDC can help you identify yo
by everybodyknows 6y ago
>The approval number on your mask should begin with "TC." The mask should also have a NIOSH logo printed on it. This image from the CDC can help you identify your mask's markings.
>Then, you can check for the approval number on NIOSH certified equipment list.