| 摘要 |
<p>In one aspect, the present invention is directed to a three-dimensional article produced from sheet material, comprising a frame unit having a plurality of outer sides made of sheet material each having a different angular disposition, wherein first and second longitudinal ends of the frame unit are interconnected by means of a female fastener embedded in the first end and of a male fastener introduced through the second end and coupled with said female fastener.</p> |
