{HEAD ~ Each second planar surface} extends upwardly from the first surface and outwardly with {TAIL ~ respect} to the opening and contacts both of the first planar surfaces 47, 48 
{ HEAD ~ Each second planar surface } extends upwardly from the first surface and outwardly with { TAIL ~ respect } to the opening and contacts both of the first planar surfaces 47 , 48
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH