The body portion 32 thus contains {HEAD ~ many magnetic flux lines} at {TAIL ~ a higher density} than the surrounding air 
at
The body portion 32 thus contains { HEAD ~ many magnetic flux lines } at { TAIL ~ a higher density } than the surrounding air
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH