| 摘要 |
1449999 Container for breathing mask filter INDUSTRIE PIRELLI SOC PER AZIONI 25 June 1974 [4 July 1973] 28070/74 Heading BIT A container for attachment to a breathing mask and adapted to contain filter medium 3, such as charcoal, felt or glass wool, comprises a cup 2 with a perforate base and a lid 4, both of synthetic plastics, the lid being resilient and less rigid than the cup so as to make a snap connection therewith when the lid is forced past inwardly projecting lip 6. The cup and lid may be of the same or different plastics. |
