Applying {HEAD ~ blowing pressure} through {TAIL ~ the embossing dies} and applying a vacuum through the undercut shaping portion 
through
Applying { HEAD ~ blowing pressure } through { TAIL ~ the embossing dies } and applying a vacuum through the undercut shaping portion
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH