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Dispositivo sonoro para muñequería esencialmente caracterizado por el hecho de que el émbolo introducido y deslizable en la caja cilíndrica tiene practicado alrededor de su contorno un profundo canal dentro del cual va alojada una arandela elástica en forma de anillo circular ceñido a presión sobre dicho canal con parte de su anchura sobresaliendo del mismo alrededor del émbolo.
ES137506U1968-03-301968-03-30Dispositivo sonoro para manguera
PendingES137506U
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