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