hinge, pivot, gear, system of gears, system of interconnected gears, system of interconnected springs or elastic bands. Posted on December 19, 2022 by Kenneth Udut Leave a comment hinge, pivot, gear, system of gears, system of interconnected gears, system of interconnected springs or elastic bands. 🔊 Listen to this Leave a comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. nine − = 8 Leave a Reply