The control voltage is selected in such a manner that it is dependent on the size of {HEAD ~ return stroke} in order to compensate {TAIL ~ the alteration} in the return stroke 
The control voltage is selected in such a manner that it is dependent on the size of { HEAD ~ return stroke } in order to compensate { TAIL ~ the alteration } in the return stroke
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH