Accordingly , the Width of a striation coincides With the pitch .
A plurality of striations Were formed parallel to score lines , like the golf club head 1 in FIG. 1 , and continu ously formed in the arrangement direction as shoWn in FIG. 5 .
The Width of a striation coincides With the pitch .
A plurality of striations Were formed parallel to score lines , like the golf club head 1 in FIG. 1 , and continu ously formed in the arrangement direction as shoWn in FIG. 5 .