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SIGMA KOKI CO., LTD. Established in April 1977, Tokyo, develops and manufactures Machining center, Wire electric discharge machine, Grinding machine, NC mold polisher, NC lathe, Five-axis bridge type CNC machining center, NC engraver, Surface generator, Polishing machine (Lenses, Prisms, Laser crystals), Lapping machine, Optical coating machine, Precision slicing machine .
Products include: