The extruded coating layer 4 may preferably be in a thickness of {HEAD ~ 50 μm} at {TAIL ~ maximum} in view of working efficiency 
at
The extruded coating layer 4 may preferably be in a thickness of { HEAD ~ 50 μm } at { TAIL ~ maximum } in view of working efficiency
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH