As best seen in FIG 13, {HEAD ~ the width} of the race 320 narrows along {TAIL ~ the length} of the base 312 due to the transverse side wall 321 b 
narrows along
As best seen in FIG 13 , { HEAD ~ the width } of the race 320 narrows along { TAIL ~ the length } of the base 312 due to the transverse side wall 321 b
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH