....

Separate print heads assumes an inkjet model. These deposition methods
do not have print heads. they lay down a layer of powder and then melt it
where it needs to form the image.


The Desktop Metal system is more akin to inkjet printing and does not use
powders:

Desktop Metal Production System.
https://www.youtube.com/watch?v=aUOCiRktuCo


Bob Clark

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Finally, nanotechnology can now fulfill its potential to revolutionize
21st-century technology, from the space elevator, to private, orbital
launchers, to 'flying cars'.
This crowdfunding campaign is to prove it:

Nanotech: from air to space.
https://www.indiegogo.com/projects/n...ce/x/13319568/
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