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