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Just last week I string to think how I'd make ball bearings and this strategy came to mind. Neat to see that it's actually feasible.
by ahupp 13y ago
Just last week I string to think how I'd make ball bearings and this strategy came to mind. Neat to see that it's actually feasible.
- willvarfar 13y ago(Although bearings are made cold. See https://news.ycombinator.com/item?id=6374786 https://news.ycombinator.com/item?id=6374786 )