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The least of their problems. And it's an effect of the glancing light.
If I have wheels I want to drill holes in, I could fold aluminum disks over the old holes and drill through that to effect a repair.
Pizza pans are flat, Moon or Speedway disks are convex to stiffen them.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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