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AM = Additive Manufacturing

https://mitsloan.mit.edu/ideas-made-to-matter/additive-manuf...

> Technically, additive manufacturing can refer to any process where a product is created by building something up, such as molding, but it typically refers to 3-D printing.

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Makes sense. Combustion engine block/head manufacturing is similarly limited by the need for oil/cooling canals. With 3D printing you no longer have to worry about how are you going to drill and plug those.

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