Thus, releasing the synthetic resin sheet from {HEAD ~ the embossing surface} and forming {TAIL ~ an undercut} in the synthetic resin sheet 
Thus , releasing the synthetic resin sheet from { HEAD ~ the embossing surface } and forming { TAIL ~ an undercut } in the synthetic resin sheet
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH