Next, at the end of the backward stroke of the first ram, the forming punch together with the pressure pad is lowered to form a bulge on {HEAD ~ a head portion} of {TAIL ~ the coupling element} 
of
Next , at the end of the backward stroke of the first ram , the forming punch together with the pressure pad is lowered to form a bulge on { HEAD ~ a head portion } of { TAIL ~ the coupling element }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL