| http://www.w3.org/ns/prov#value | - In the use state, the noxiants, including the aerosols and particles, that are to be rendered harmless thus initially, after passing through the outer covering layer 5, impingeon the particle- and/or aerosol-filtering layer 6 where the noxiant particles and aerosols in question are rendered harmless, and the noxiant stream which may still contain chemical and/or biological noxiants after it has be
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