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    Helium purification plant of Zeppelin station in Frankfurt

    Hausen, M.H. | Engineering Index Backfile | 1938
    Schlagwörter: Helium

      Helium purification plant of Zeppelin station in Frankfurt

      Hausen, M.H. | Engineering Index Backfile | 1938
      Schlagwörter: Helium

    Helium for airships

    Engineering Index Backfile | 1921
    Schlagwörter: Helium

    Helium and its value for airships

    Litchfield, P.W. | Engineering Index Backfile | 1925
    Schlagwörter: Helium

    Train wreck test for steel sphere to carry helium

    Engineering Index Backfile | 1929
    Schlagwörter: Helium