Wade-Dahl-Till valve was partially built by the novelist of what nationality?
Roald Dahl Roald Dahl ( , ] ; 13 September 1916 – 23 November 1990) was a British novelist, short story writer, poet, screenwriter, and fighter pilot. His books have sold more than 250 million copies worldwide.
William Armstrong Fairburn William Armstrong Fairburn (12 October 1876 – 1 October 1947) was a noted American author, naval architect, marine engineer, industrial executive, and chemist.