We just learned about the type of metal working called Stamping.
Another way to work with metal is called Electrical Discharge Machining or EDM for short.
It is also sometimes called spark machining, spark eroding, burning, die sinking, wire burning or wire erosion.
This is a way to cut some parts out of a piece of metal using electricity.
A special tool zaps a piece of metal with some electricity, and the power of the electricity is so strong it cuts into the metal.
(from: wikipedia - electrical discharge machining)
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