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A Damper consisting of one or more openings in the Horn receiver and a Damper System formed by a keyboard which allow the Regulation of the effect of Sound of the HornIn the membrane of the Diaphragm during the Impressions fo
A Damper consisting of one or more openings in the Horn receiver and a Damper System formed by a keyboard which allow the Regulation of the effect of Sound of the HornIn the membrane of the Diaphragm during the Impressions fo
