As long as curve C stays within {HEAD ~ the range} of linearity, fine displacing element 112 provides {TAIL ~ all adjustment} in the Y direction  
As long as curve C stays within { HEAD ~ the range } of linearity , fine displacing element 112 provides { TAIL ~ all adjustment } in the Y direction
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH