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