Additionally, {HEAD ~ the clearance} between {TAIL ~ the member} and the surface of the previous cross section may vary for each sweep 
between
Additionally , { HEAD ~ the clearance } between { TAIL ~ the member } and the surface of the previous cross section may vary for each sweep
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH