摘要 |
The unit (100) has an outer wall (111) forming a positively curved surface and surrounding an inner chamber. The unit is made of a foam construction material (19). At least one opening (11-13) is formed in the wall. Preferably, the unit is formed as a hemisphere, or hemi-ovoid shape with a floor plate (10) of foamed or another material securely fitted to the wall at the equator part of the shape. An Independent claim is included for a method for manufacturing the unit.
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