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