Design and experimental validation of a pendulum energy harvester with string-driven single clutch mechanical motion rectifier - ScienceDirect
String Shelf System
String-based flapping mechanism and modularized trailing edge control system for insect-type FWMAV - DuHyun Gong, DaWoon Lee, SangJoon Shin, SangYong Kim, 2019
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Photograph of the string based mechanism showing opening movement. The... | Download Scientific Diagram
newtonian mechanics - How are the number of strings in a pulley system quantified? - Physics Stack Exchange