{HEAD ~ The middle section} 48 includes a series of {TAIL ~ notches} 56 and raised portions 58 of a type well known in the art 
{ HEAD ~ The middle section } 48 includes a series of { TAIL ~ notches } 56 and raised portions 58 of a type well known in the art
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH