The frame includes a selected number of {HEAD ~ horizontal muntins} and vertical mullions defining {TAIL ~ a plurality} of clear window openings 
defining
The frame includes a selected number of { HEAD ~ horizontal muntins } and vertical mullions defining { TAIL ~ a plurality } of clear window openings
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH