Before there were such things as computer-aided design (CAD) and lasers, models and prototypes were laboriously carved from wood or stuck together from little pieces of card or plastic. They could take days or even weeks to make and typically cost a fortune.
Original Article Source Credits: Explain That Stuff , https://www.explainthatstuff.com/
Article Written By: Chris Woodford
Original Article Posted on: January 16, 2020
Link to Original Article: https://www.explainthatstuff.com/how-3d-printers-work.html