A printer, controlled by the microprocessor, presents a permanent record of {HEAD ~ the battery analysis}, while a display unit, under program control, directs an operator in {TAIL ~ the use} of the analyzer 
A printer , controlled by the microprocessor , presents a permanent record of { HEAD ~ the battery analysis } , while a display unit , under program control , directs an operator in { TAIL ~ the use } of the analyzer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH