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Qingdao H. Y Corporation has started production of twin ring wire, also called wire o or double loop wire from 1991 by 18 sets German Womako, Bielomatic and Proloop forming machines. We adopt high quality nylon coated wire as raw material passing SGS test, Reach or Rohs standard. Nowadays, Qingdao H. Y Corporation has established long term business relationship with many international well-known office stationery companies, like ACCO, APP etc. Qingdao H.Y Corporation has a broad range of products, including twin ring wire, metal spiral wire, calendar hanger, semi-automatic punching machine, fully-automatic punching machine, multi-functional binding machine, semi-automatic binding machine, fully-automatic binding machine, wire-cutting machine, nylon-coated wire, drill bits, punches and different dies. Qingdao H.Y Corporation has a strong R&D capability and establishes its own R&D center. It obtains many national patents for punching and binding machines etc