A reactor comprising {HEAD ~ an annular iron core} constituting {TAIL ~ a closed magnetic path} and a conductor wound on the iron core 
constituting
A reactor comprising { HEAD ~ an annular iron core } constituting { TAIL ~ a closed magnetic path } and a conductor wound on the iron core
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH