| 摘要 |
The present invention provides a cardboard-based unit, comprising one or more substantially planar elements comprising two or more layers of cardboard that are closely associated with one another and being constituted by a formed cardboard panel having a first and second faces; and at least two core-envelope elements comprising enveloping portions of the panel that are wrapped about two or more elongated members such that the panel comes into tight association with said members; the planar elements and the core-envelope elements in the unit are integral with one another. |
