Complex sentence: However, the book explained how this simple'fire arrow' evolved into the metal-tube launched rocket, and gave description of various rocket launchers that launched tons of rockets at a time, Needham, Volume 5, Part 7,489.
Split into simpler sentences: However, the book explained how this simple'fire arrow' evolved into the metal-tube launched rocket. The book provided descriptions of various rocket launchers that launched tons of rockets at a time, Needham, Volume 5, Part 7,489.