{HEAD ~ The magnetic core} 30 has {TAIL ~ a core length lm} and the coil 24 has a coil length lc less than the core length lm 
{ HEAD ~ The magnetic core } 30 has { TAIL ~ a core length lm } and the coil 24 has a coil length lc less than the core length lm
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH