How metal can now be 3D printed (additive manufacturing?) like you can with by dripping plastic layer by layer and it dries up over time?
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SLS or selective laser sintering is essentially using a high powered laser to melt powdered metal and weld it together layer by layer. A machine deposits a layer of the required metal powder. Then a laser traces the outline of the outline layer melting the powder in that spot and welding it to the layer below.
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