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