| http://www.w3.org/ns/prov#value | - The electrical discharge machining method of the embodiment is the one in which the inside corner portion of radius R is machined by a cylindrical or tubular electrode 1B, and which finishes thereafter the corner portions, which the above cylindrical or tubular electrode 1B fails to remove, by use of the tubular electrode 1B of such a shape as part of the liquid hole portion covers the corner port
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