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