N95 and R95 Respirators - The Difference? - Major Safety- หน้ากากหน้า n95 vs r95 ,The N95 and R95 nomenclature originate with, and are approvals from, NIOSH. NIOSH is the National Institute for Occupational Safety and Health. It is the government agency that tests the respirators to verify they actually filter what they are marketed to filter.

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