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.
Jules Verne Jules Gabriel Verne ( ; ] ; 8 February 1828 – 24 March 1905) was a French novelist, poet, and playwright.