As described above, {HEAD ~ the longitudinal axis} of {TAIL ~ the glass core} 20 is substantially centered with respect to the exterior surface 54 on the second sleeve 50 
of
As described above , { HEAD ~ the longitudinal axis } of { TAIL ~ the glass core } 20 is substantially centered with respect to the exterior surface 54 on the second sleeve 50
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH