| 摘要 |
<p>The can has, in at least one of its side walls, at least one recess in the outer surface and, in the opposed side wall, at least one projection from the outer surface which is receivable in the recess. The recess and the projection have a non-circular form, triangular, squared or with several sides. The recess has sides which taper inwardly and the projection has sides which taper outwardly. There may be two or recesses and a similar number of projections.</p> |
