Dangos 1 - 1 canlyniadau o 1 ar gyfer chwilio 'NATIONAL CONCRETE MASONRY ASSOCIATION. United States', amser ymholiad: 0.01e Mireinio'r Canlyniadau
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    SOUND REDUCTION PROPERTIES OF CONCRETE MASONRY WALLS; REPORT OF SOUND TRANSMISSION LOSS AND AIR FLOW RESISTANCE MEASUREMENTS ON CONCRETE BLOCK WALLS.
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