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