Before revision: The Wu Pei Chih (1621) later described Turkish muskets that used a rack-and-pinion mechanism, which was not known to have been used in any European or Chinese firearms at the time.
After revision: The Wubei Zhi (1621) later described Turkish muskets that used a rack-and-pinion mechanism, which was not known to have been used in any European or Chinese firearms at the time.