| 摘要 |
The present invention proposes a transparent insert (illustrated on attached drawings marked 3 on FIG. 3 ) with lines or other indicia printed or etched onto the upper surface of the insert (marked 1 on FIG. 3 ) and also onto the lower surface (marked 2 on FIG. 3 ) so that a three dimensional image is formed. The golfer by himself or with the help of a playing partner or a caddy can align the lines or indicia to achieve the desired putting stroke.
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