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Dufourg Joseph
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Dufourg Joseph
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Un aparato perfeccionado para encender y apagar automáticamente, con rapidez y a distancia los faroles de gas para el alumbrado público y los de otras clases.
Un dispositivo para la utilización de los vapores de escape en los motores de mezcla detonante particularmente para el empleo de hidrocarburos sólidos ó poco volátiles.