| 摘要 |
The iron golf club head ( 20 ) of the present invention is preferably composed of three main components: a periphery member 22 , a central member 24 and a nanocrystalline plated face plate 26 . The periphery member ( 22 ) is preferably composed of a high density material such as a nickel-tungsten alloy. The central member ( 24 ) is preferably composed of a lightweight, non-metal material. The face plate ( 26 ) is preferably composed of a non-metal material plated with a nanocrystalline material. The iron golf club head ( 20 ) preferably has high moments of inertia Izz and Ixx.
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