Recommendedusage:Fangdunhalfmask+2102N/2202NKN100filtercottonor6101Pfiltercartridge.
    Replacementsuggestions:Theservicelifeofthemaskis>365days(sparepartscanbereplacedifthereisanydamage).Thefiltercottonshouldbereplacedinatimelymannerwhencontaminationisfoundthroughtheobservationwindoworwhenthereisafeelingofrespiratorystuffiness.Forexample,theaveragedustconcentrationinundergroundcoalmineoperationsisgenerallyabove450mg/m³.Themainhazardisinhalablefreedust(withaparticlesize<5μm).Whenworkinginanenvironmentwithsuchadustconcentrationfor8hours,itisrecommendedtoreplacethefilterelementinatimelymannerifbreathingdifficultiesoccur.