| 摘要 |
The improvements comprise the arrangement of a cavity in the upper face of each brick and protuberances in the lower face thereof in order to allow controlled filling of the upper cavity by means of the settable cement mass joining the bricks and the partial coincidence of the protuberances of the lower face inside the cavity of the adjacent brick, in order to allow levelling and displacement of the setting mass in a controlled manner. The volume of interposition of the protuberances of the lower face in the upper cavity of a brick for the position of abutment between both corresponds to the volume of the joins between bricks, with no lateral excess. <IMAGE>
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