Opening and Closing Mechanisms (video) University of Vienna Loading video... Caption This video shows opening and closing mechanisms. Credit Copyright: Anna Stary-Weinzinger and Tobias Linder Usage Restrictions The video may only be used with appropriate caption or credit. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.