| 摘要 |
A smoking article 10 having a cylinder 20 of smoking material 21 and a filter system attached to the cylinder of smoking material. The filter system includes an upstream plug 42 of filtering material, a downstream plug 46 of filtering material, and a cavity between the upstream plug of filtering material and the downstream plug of filtering material. A flow constrictor 70 is positioned within the cavity and has at least one orifice, and a series of perforations 60 provide ventilation to the smoking article.
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