Exemplary embodiments of the invention relate to a method for producing {TAIL ~ a protective structure}, and {HEAD ~ the protective structure} 
Exemplary embodiments of the invention relate to a method for producing { TAIL ~ a protective structure } , and { HEAD ~ the protective structure }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD