| http://www.w3.org/ns/prov#value | - Facade elements are known in a large number of variants of surface design, construction, and the material used therefor, such as wood, glass, plastic, ceramic, natural stone, and metal.The facade elements must be attached to the under-structure in a manner that ensures that they are secured from falling out due to forces that may occur, and that ensures that any thermally-induced changes in length
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