First, {HEAD ~ the openings} 45 are patterned in {TAIL ~ a mask}, which is a bendable plate 
are patterned in
First , { HEAD ~ the openings } 45 are patterned in { TAIL ~ a mask } , which is a bendable plate
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH