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(11) | EP 0 206 437 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Block mat comprising concrete blocks |
(57) A block mat comprising concrete blocks fastened to a carrying cloth with the aid
of nails driven through the cloth into the blocks, whereby the blocks have been provided
with preformed holes for accomodating the nails which have been provided with a head
and a shank having at least slightly resilient extensions, the outer diameter defined
by the free edges of said extensions in unloaded condition being greater as the inner
diameter of said holes. |