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