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Amazon.com: Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) -
![The three expandable ring mechanisms made during the iterative prototyping. | Download Scientific Diagram The three expandable ring mechanisms made during the iterative prototyping. | Download Scientific Diagram](https://www.researchgate.net/publication/323762477/figure/fig5/AS:701095835869186@1544165681628/The-three-expandable-ring-mechanisms-made-during-the-iterative-prototyping.jpg)
The three expandable ring mechanisms made during the iterative prototyping. | Download Scientific Diagram
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