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by-layer, like baking a loaf of bread slice by slice. Popular FDM 3D printers include MakerBot and Ultimaker. Here's a look at how simple 3D printing might work on an FDM printer. Download a 3D model you want to print, or design one yourself. If it isn't already, convert the model into a 3D printing format, such as an STL file. Import the model ...
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