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