Air filters for industrial use; air circulation apparatus; air cleaning apparatus; air cleansing apparatus; air cleaning filters (parts of air cleaning machines or installations); air cleaning instruments; air cleaning machines; air dehumidifiers; air deodorising apparatus; air processing [purifying] apparatus and machines; air purifying apparatus and machines; air purifying units for commercial use; air filters for industry use; air filtering apparatus and installations; air filters for use as dust extractors; apparatus for purifying air; apparatus for collecting dust from the air; apparatus for extracting dust (ventilation); apparatus for filtering dust; dust filters; electronic air purification apparatus; devices for removing pollutants from the air; filters for dust; apparatus and machines for collecting particulates from air; pollution filters and scrubbers (parts of industrial installations); filters for air purifiers; filters for cleaning air; filters and dust collectors (for collection of dust from air) for industrial applications; dust suppression apparatus and installations, namely, dust retention units that prevent dust from escaping the filter when the air exits through the air outlet; parts and/or accessories for the aforementioned