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