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