electrodes and accessories for electrical discharging machines, namely, electrodes of graphite, silver copper, and wolfram, tubular electrodes of copper and brass and wire-electrodes of cooper, brass, steel and coated wire electrodes; holding fixture particularly work pieces and electrodes, for holding on electrical discharging machines, wire hatcher for spark erosion machines, filters and filter elements for filtering of dielectricum relative to electrical discharge machining of work pieces
Electrical and Scientific Apparatus