{HEAD ~ The reactor} comprises {TAIL ~ an comrises} an annular iron core 11 constituting a closed magnetic path and a coil 12, a conductor wound around the iron core 11 
comprises
{ HEAD ~ The reactor } comprises { TAIL ~ an comrises } an annular iron core 11 constituting a closed magnetic path and a coil 12 , a conductor wound around the iron core 11
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH