| 主权项 |
1. A wheel, comprising:
a generally planar, multi-layer cardboard body having two side faces, a circular circumference and a hub that defines a central axis, the layers being arranged in parallel to the two side faces; the layers comprising at least one layer of a high-density cardboard sheet sandwiched between at least two layers of low-density cardboard sheet, each of said low-density cardboard sheet comprising two liner cardboard layers fitted on opposite sides of a low-density cardboard layer; the at least two layers of low-density cardboard sheet and the at least one layer of high-density cardboard sheet being fixedly attached to one another. |
