| 摘要 |
<p>The casing has casing sections provided with appendices that has interlocking projections, and pairs of transversal top sections for the assembly of strips provided to support intermediate boards. The projections are interlocked with cross-sectional braces conforming to thin flat planes. The cross-sectional braces have orifices for the passage of the projections. Support props and polygonal tubular structures are provided at the sides in parallel to the casing sections to form boundaries.</p> |
