{HEAD ~ A cross sectional shape} of each striation is {TAIL ~ an isosceles trapezoid} having an upper base at the face side and a lower base at the back side of the golf club head 
{ HEAD ~ A cross sectional shape } of each striation is { TAIL ~ an isosceles trapezoid } having an upper base at the face side and a lower base at the back side of the golf club head
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH