Rotary Joint and the System to Measure (IMAGE) American Institute of Physics Caption These images show: (Left) The structure of the rotary joint. (Right) The system to measure the joint rotation. Credit Jianwen Zhao/Harbin Institute of Technology in Weihai, University of California-Los Angeles Usage Restrictions This image may be used only with appropriate caption and credit. License Licensed content 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.