| 摘要 |
Closure block making it possible to close the corrugations of roofing made of shaped sheet metals, characterised in that these blocks (7, 10) which have a right-angled parallelepipedal shape of variable length are fixed in the corrugations (3, 4) of the roofing, these closure blocks having a laminar region (7a, 11) allowing flow of air but stopping predators from advancing below the upper layer. <IMAGE>
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