| 摘要 |
The element (1) has a tubular shape having two lateral plane faces (2, 3). It further comprises a detachable bottom (8) resting on two bearing surfaces (4, 5) provided at the lower end of the element, so as to partially close off the element while leaving openings (15, 16) on either side. This element makes it possible to build a wall by stacking the elements in a staggered configuration while leaving a space between the elements of the lower levels (11, 12). <IMAGE>
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