a following second section disposed cooperatively adjacent said first section, said second section having a leading downwardly beveled end cooperating in {HEAD ~ surface contact} with {TAIL ~ the rearward end bevel} of said first section 
with
a following second section disposed cooperatively adjacent said first section , said second section having a leading downwardly beveled end cooperating in { HEAD ~ surface contact } with { TAIL ~ the rearward end bevel } of said first section
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH