These parts are identified with {TAIL ~ reference} to the position of {HEAD ~ the tool} shown in FIGS 1 and 3 
These parts are identified with { TAIL ~ reference } to the position of { HEAD ~ the tool } shown in FIGS 1 and 3
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH