Turning to FIG 4, {HEAD ~ the draw unit} 3 of the draw frame has an input 21 and {TAIL ~ an output} 22 
has
Turning to FIG 4 , { HEAD ~ the draw unit } 3 of the draw frame has an input 21 and { TAIL ~ an output } 22
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH