{TAIL ~ A window unit frame} is received in {HEAD ~ each clear window opening} supported by and electrically connected to the frame 
{ TAIL ~ A window unit frame } is received in { HEAD ~ each clear window opening } supported by and electrically connected to the frame
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH