FIG 1 shows an example in which {TAIL ~ the present invention} is applied to {HEAD ~ an iron golf club head} 
FIG 1 shows an example in which { TAIL ~ the present invention } is applied to { HEAD ~ an iron golf club head }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD