| 摘要 |
A wall section is disclosed for a trailer. The wall section comprises a male end and a female end. The male end includes a central recess having at least one protrusion on each side of the central recess, the protrusions defining respective lateral recesses. The female end includes a central protrusion having at least one lateral protrusion on each side of the central protrusion, the central protrusion and the lateral protrusions defining respective recesses.
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