| 摘要 |
<p>Screw cap of the type that is formed of at least an annular body which is screw threaded and at one end is provided with a sealing wall, characterized thereby that at the inner side of said sealing wall (6) an annular projection (8) is provided, in the vicinity of said sealing wall (6) the inner side of said annular body (2) possesses a cylindrical part, and a small rib (10) is provided between the inner side (7) of said annular body (2) and the outer side (9) of said annular projection (8).</p> |
