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ÖNORM EN 772-20:2005-05

Действует
Methods of test for masonry units - Part 20: Determination of flatness of faces of masonry units (consolidated version)
This European Standard specifies a method for determining the flatness of surfaces of masonry units.
Diese Europäische Norm legt ein Verfahren zur Bestimmung der Ebenheit von Oberflächen von Mauersteinen
fest.
ICS
91.100.30 Concrete. Including admixtures / Бетон и изделия из бетона