I do not know very well how to translate a text about the vacuum cleaner invention. The sentence I do not know how to translate isunderlined. This is it: "One day Hubert Cecil Booths went to see an inventor demonstrate his new dust-removing machine at a London railway station. A huge air blower was placed over the open door of a train. The idea was to blow dirt into a bag which was put over another door. A lot of dust was pushed up into the air but then came down again inside the train instead of inside the bag. Booth didn't think it was a very good idea". A huge air blower was placed over the open door of a train I think it is: Un enorme extractor fue situado encima de la puerta abierta de un tren But was the door on the ceiling or on the side of the train? I do not really understand it. And I don't know why the bag was put over another door of the train. ----------------------- Nota de moderación: los títulos de los hilos deben incluir la frase que se va a traducir (regla 3). Por favor, toma esto en cuenta en el futuro.