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ES0006737U1941-08-131941-08-13Frascos o recipientes con un segundo orificio cubierto con una membrana que actúa de bomba para la salida del líquido.
ExpiredES6737Y
(es)
Un tapón automático de metal, con precinto, que adaptado al cuello de una botella u otro recipiente permite la salida del líquido que contenga e impide la entrada de otro cualquiera.