| 摘要 |
A strike face of a golf club head comprises a plurality of arched grooves formed by extending each pair of top edges respectively of two lateral walls in a groove on a back of each unit strike face between each pair of neighboring score lines in a strike face of a golf club head. In this way, the cutaway section on the back of the strike face looks like an arched bridge and the weight decrement of the arched grooves can be used for changing the center of gravity of the golf club head.
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