{HEAD ~ A magnetic body} 1, wherein {TAIL ~ said parallel surfaces} intersect said surface means at 90° angles 
wherein
{ HEAD ~ A magnetic body } 1 , wherein { TAIL ~ said parallel surfaces } intersect said surface means at 90 ° angles
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH