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Mar 21, 2020 · In 2015, it changed from compulsory certification to voluntary certification. If the plug-in type is used for anti-fog and haze, it must meet the GB / T 32610-2016 standard. Civil use meets GB / T 32610-2016 standard. (3) Thermal masks:Thermal masks are suitable for winter wear, as long as they meet the relevant standards of fabrics.