The multilayer circuit board has {HEAD ~ contact areas} at {TAIL ~ positions} corresponding to the openings in the insulating board 
at
The multilayer circuit board has { HEAD ~ contact areas } at { TAIL ~ positions } corresponding to the openings in the insulating board
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH