Those rings don't look like any vortex rings I have come across before. If I was to hazard a guess, I'd say Chinese made.
Will be interesting to see how much material gets removed if you were to lap those rings.
Those rings don't look like any vortex rings I have come across before. If I was to hazard a guess, I'd say Chinese made.
Will be interesting to see how much material gets removed if you were to lap those rings.
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