The lead assembly 1, wherein {HEAD ~ the continuously deflectable preformed curvature} has {TAIL ~ a maximum change} of 0.5 mm of radius of curvature per 1 mm of arc length 
has
The lead assembly 1 , wherein { HEAD ~ the continuously deflectable preformed curvature } has { TAIL ~ a maximum change } of 0.5 mm of radius of curvature per 1 mm of arc length
OTH OTH OTH OTH OTH OTH HEAD HEAD 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