{TAIL ~ PC meter} 10 includes {HEAD ~ conventional PC} 16, display 18 and printer 20 
{ TAIL ~ PC meter } 10 includes { HEAD ~ conventional PC } 16 , display 18 and printer 20
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH