Electro-discharge machining
[ih-lek-troh-dis-chahrj] /ɪˈlɛk troʊˈdɪs tʃɑrdʒ/
noun, Metallurgy.
1.
a technique for shaping the surfaces of a metal object by immersing in a dielectric liquid the object and a tool that emits an electric discharge of high current density and short duration.
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