For example, {TAIL ~ a metal layer} connects the two sub regions of {HEAD ~ center region} 34 
For example , { TAIL ~ a metal layer } connects the two sub regions of { HEAD ~ center region } 34
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH