{HEAD ~ the maximum length} of {TAIL ~ the partial region} in the radial direction is 0.4 mm or more 
of
{ HEAD ~ the maximum length } of { TAIL ~ the partial region } in the radial direction is 0.4 mm or more
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH