| 摘要 |
A smoking article (10) has a filter (20) located at one end, the filter comprising at least first, second and third sections (34,41,51) disposed in succession along a cylindrical axis of the smoking article. Each of the first (31) and third (51) sections includes at least one tube (35,55) running the length of the respective section, substantially parallel to the cylindrical axis of the smoking article. The second section (41) comprises material of substantially higher filtration efficiency than the tubes (35,55) of the first and third section. Ventilation (43) may be provided around the circumference of the filter in one or more zones. |
