I think we developed a lot of the technology for this scale of printing here at ORNL. I saw a large 3-D printer that printed with concrete probably 6-8 years ago.
An article from back in the day:
https://www.ornl.gov/news/ornl-cincinnati-partner-develop-commercial-large-scale-additive-manufacturing-system
We 3-D print stuff all the time now. Like complex parts using titanium that simply can't be machined conventionally. Very handy.
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Mike
1976 Euro 911
3.2 w/10.3 compression & SSIs
22/29 torsions, 22/22 adjustable sways, Carrera brakes
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