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t098i3today at 2:08 AM1 replyview on HN

...this commenter has never worked in manufacturing or studied materials science, and it shows.

Or, I'd wager, dropped a 3D printed resin part on a hard floor and watched it shatter like glass.


Replies

Animatstoday at 7:12 AM

I-beam made from PLA with 3D belt printer.[1] Can be looked at.

I-beam made from steel with rolling mill.[2] Can hold up large building.

[1] https://www.youtube.com/watch?v=PQ-h-ErqrEg

[2] https://www.youtube.com/watch?v=MfaqrVFnQBQ