FIG 4 more completely illustrates the nature and relationship of {HEAD ~ convex shape} 9 with {TAIL ~ its matte finish} 3 to angular shoulder 8, wall 7 and open end 6 
FIG 4 more completely illustrates the nature and relationship of { HEAD ~ convex shape } 9 with { TAIL ~ its matte finish } 3 to angular shoulder 8 , wall 7 and open end 6
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH