| 摘要 |
A tobacco smoke filter which has a tar retention of at most 50% and comprises a relatively high draw resistance downstream filtering plug (2) of at most 50% tar retention, a relatively low draw resistance upstream filter plug (3) of at most 22% tar retention spaced longitudinally upstream therefrom, and a filter wrapper (4) engaging around and joining the spaced plugs to define a cavity (6) therebetween. |
