Doorkeeper can also be said of a person who is posted at the door to guard, but #doorkeeper in the hardware and manufacturing sense is the #mechanical or #automatic device that holds #doors closed and regulates passage through them—e.g., latches, locks, and hinges. Read More: https://www.howto-tips.com/how-to-money-saving-tips-in-2024/doorkeeper-understanding-manufacturing-process