... manufacturer for the purifying equipmentand air filterSuch as HEPA / ULPA filter, carbon filter, bag filter, pre-filter. air shower, air shower wall, pass box, fan ... indoor air of buildings, laboratories, surgeries .clean roomand workshops.HEPA air filter for Final or return filtration for clean roomsIt is patent ... and we will promptly answer any questions you may have. HEPA and ULPA Filter with hood