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