| 摘要 |
<p>The box has a cover (2) formed of a cylindrical arch (21) bordered by two front surfaces (23) connected to the arch by a tapered zone (22), where the cover has a piling cavity (25) near its top. A base (1) has a rectangular bottom with tapered corners occupied by a projected piling arch (16) and followed by a tapered ramp at the level of front walls. The base has section corresponding to top of the arch and the ramp has a shape corresponding to the zone. The ramp has a piling pin (18) homologous to the cavity for being fitted when two boxes are piled.</p> |
