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acoustic horns does, consisting of a in a kruemmer endigenden tonfuehrungsarm and so arranged that the tube end of the reflector, the reflector einmuendet arms in the seitenflaeche
acoustic horns does, consisting of a in a kruemmer endigenden tonfuehrungsarm and so arranged that the tube end of the reflector, the reflector einmuendet arms in the seitenflaeche