This sub assembly is manufactured by making {HEAD ~ a pattern} of {TAIL ~ apertures} in a planar element, thereby forming a number of securing elements 
of
This sub assembly is manufactured by making { HEAD ~ a pattern } of { TAIL ~ apertures } in a planar element , thereby forming a number of securing elements
OTH OTH 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 OTH OTH OTH OTH