The ball is not microscopic, but the tolerances required to make the ball spheri... | Hacker News

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OneDonOne 77 days ago | parent | context | favorite | on: Why jet engines aren't made in China

The ball is not microscopic, but the tolerances required to make the ball spherical and fit into the socket are.

margalabargala 77 days ago [–]

Exactly, so this sentence is incorrect:

> Ballpoint pen tips are microscopic tungsten carbide ball held inside ultra-thin steel sockets

OneDonOne 77 days ago | [–]

Yes indeed, you are correct. My mistake.

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