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