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2012
(Lower) Printed receiver with 75% scale model (Upper) Original AR-15 lower receiver (via HaveBlue)   Every time there comes an innovative technology, something like this happens.   It was only a matter of time before someone got the idea to use a 3D printer to manufacture fire-arms, and while he may or may not be the first, AR15.com forum member HaveBlue has succeeded in printing out polymer AR-15 lower receiver. Polymers have been used for some time now for firearms lower receivers ...
  Bioengineering has traversed the all importaaant step of building artificial organs that could soon be used in place of traditional transplants. A working set of artificial arteries that deliver the nutrients and oxygen necessary to keep living cells alive and functioning properly has been made by current manufacturing technologies. Bioengineers from MIT and UPenn are developing a method for constructing networks of vessels by using a common, open source 3D printer modified to print usin ...

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