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filter for a smoking article, smoking article, and method for making a smoking article
filter for a smoking article, smoking article, and method for making a smoking article
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机译:用于吸烟制品的过滤器,吸烟制品以及制造吸烟制品的方法
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摘要
A filter for a smoking article comprises elongate body 4 of filter material 7 for filtering smoke, an inner wrapper comprising first and second regions 9, 10 of non-porous material around and spaced apart along the length the filter material 7 to define a gap 11 that acts as a ventilation zone, and an outer wrapper 13 of porous material overlying the inner wrapper such as to allow ventilation air to be drawn through the ventilation zone and pass into the filter material (a) through the porous third wrapper and (b) longitudinally between inner wrapper and the outer wrapper.
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