{HEAD ~ The projecting parts} project by {TAIL ~ more than twice the thickness T} of the sheet metal 
project by
{ HEAD ~ The projecting parts } project by { TAIL ~ more than twice the thickness T } of the sheet metal
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH