Page 7 - 3-D Printers - 21st Century Inventions
P. 7
The most common 3-D
printer has a heater that
melts plastic. Then the plastic
is squeezed out of a nozzle
into thin layers. Many layers
of plastic form an object.
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ABD_INVT_3DP_FPGS.indd 11 4/27/18 12:51 PM
