{HEAD ~ A voltage surge suppressor} 1 further comprising {TAIL ~ diagnostic means} to indicate the status of the varistor 
comprising
{ HEAD ~ A voltage surge suppressor } 1 further comprising { TAIL ~ diagnostic means } to indicate the status of the varistor
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH