| 摘要 |
A tobacco smoke filter or filter element comprising: a longitudinally extending core which includes tobacco smoke filtering material; and an outer wrapper engaged around the longitudinal extending core; wherein the longitudinally extending core includes one or more channels extending longitudinally upstream from the downstream end of the core; and wherein the downstream end of the outer wrapper extends beyond the downstream end of the core around which is engaged to define a cavity at the downstream end of the filter. |
