| 摘要 |
The present invention relates to a vertical joint intended to be interposed between two juxtaposed hollow bricks each comprising a plurality of horizontal channels resulting from the crossing of the four external walls and of (from) bracing walls of the bricks according to the main patent. According to the present certificate of addition, the exterior edge of the vertical joint is extended by a peripheral sealing joint 54 which is intended to be compressed between the external walls of two adjacent bricks. <IMAGE>
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