Still referring to FIG 1, {TAIL ~ block} 15 depicts the first step in the practice of {HEAD ~ this invention} 
Still referring to FIG 1 , { TAIL ~ block } 15 depicts the first step in the practice of { HEAD ~ this invention }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD