- World record - Depth to diameter ratio bigger than 1000 A new world record was set in the successful development of EDM fast hole drilling proces- ses by Mr. Markus Munz , chief of the scienti- fic department at the Institute of Materials and Processes (IMP) in Karlsruhe, Germany. He and his colleagues succeeded in drilling a hole with a depth of 1.036 mm. This is already amazing, but what is astonishing the professi- onal world is the

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