The bobbin includes {HEAD ~ an armature mounting structure}, usually in {TAIL ~ the form} of slots in flanges of the bobbin 
The bobbin includes { HEAD ~ an armature mounting structure } , usually in { TAIL ~ the form } of slots in flanges of the bobbin
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH