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    related to: sikorsky helicopters
  1. It was Sikorsky to invent the first working helicopter . Sikorsky is an American company. DaVinci's sketches of...

    10 Answers · Education & Reference · 25/09/2006

  2. yes - Igor Sikorsky - Sikorsky Helicopters

    4 Answers · Education & Reference · 09/03/2010

  3. ...on offer from = BrE; offered by = AmE the American Helicopter society's Igor Sikorsky Prize Fund. > the American Helicopter ...

    3 Answers · Education & Reference · 21/03/2017

  4. ... Games Slayter John H. Thomas * 1939: Helicopter : Igor Sikorsky * 1939: View-master: William Gruber * 1939: ...

    2 Answers · Education & Reference · 25/05/2008

  5. It has nothing to do with ordinal numbers. The -ing form normally implies an ongoing process, not a single event. John is the only person in class wearing a hoodie. (ongoing) Last week, John was the only person in class who wore a...

    1 Answers · Education & Reference · 08/02/2018

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