| 摘要 |
The invention concerns a roll comprising two superposed webs of material one of which is formed with transverse ridges. At the ridge bases and tops are formed dents/protrusions. The other web is provided with ribs which are positioned in nesting relationship in the dents/protrusions, whereby the webs are secured to one another. The invention likewise concerns a method and a machine for manufacturing rolls of this kind.
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