[Japanese]
Development of Curved Hole Machining Method
Development of Automatic Discharge Gap Controller for Curved Hole Machining
Curved Hole Machining by Means of Electrical Discharge Phenomena and Electrode Feed Mechanism
L-Shaped Curved Hole Creation by Means of Electrical Discharge Machining and an Electrode Curved Motion Generator
U-shaped Curved Hole Creation by Means of Electrical Discharge Machining
http://www.takeuchi.mce.uec.ac.jp/
T.Ishida