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Desatrancador perfeccionado, caracterizado por comprender una ventosa de tipo convencional, unida superiormente a un tubo por el que discurre un embolo, que manejado por la empuñadura de que se ha provisto el extremo del embolo, permite la realización de vacio o la impulsión de aire, practicándose ambas sin esfuerzo y consiguiéndose una, mayor eficacia en el trabajo.