A single ring that can play a rotating role. It can form a swivel piece with anchor chain common link, enlarged link, end link.

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mmmmmmmmmmmmmmmmmmmmmmmm
12.515121594314184322184225
1417136664815204825204728
1619155755418225428225432
17.521170826019256031255935
1923184896521276533276438
20.525199967023297036296941
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