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