{TAIL ~ The bore} may include a first radial inner surface at the first lobe portion and {HEAD ~ a second radial inner surface} at the second lobe portion 
{ TAIL ~ The bore } may include a first radial inner surface at the first lobe portion and { HEAD ~ a second radial inner surface } at the second lobe portion
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH