| 摘要 |
In a seal for an opening, a bead of meltable glue (3) is deposited on the top face of the peripheral flange (4), the bottom face of which lies facing the metal sheet (7) about the circumference of the opening (8), holes suitable for the glue to pass through when it melts as a result of the metal sheet being heated, being provided between the top and bottom faces of the peripheral flange, the glue, when cooling, fixing together the metal sheet and the bottom of the peripheral flange. |
