| 摘要 |
The top (26a) of a metal container has a boss with a passageway through it. The boss is formed with internal serrations around the passageway and is crimped over a cylindrical flange member (12) which has external serrations, the flange member being thus retained in the top of the container. The flange member (12) has a lip (36) which seals against the underside (47) of the top of the container. The flange member (12) is internally threaded to receive an externally threaded plug (13). <IMAGE> |
