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