| 摘要 |
<p>A filter comprising a fluted head cover (1) or the like, bell-shaped and capable of being fitted by screwing onto a rigid support in an easily removable manner. This filter comprises, added and adhesively bonded onto its fluted head cover (1), a metal hood (7) whose cylindrical skirt (8) has at least one suitable impression (10) for interacting with one of the flutes (4) of the head cover and whose middle back part (9) comprises at least one excentric end stop, projecting or hollow, capable of interacting easily with a rotary driving tool. <IMAGE></p> |
