{HEAD ~ The secondary core} is preferably secured to the primary bobbin by the insert resin molding process at {TAIL ~ the time} of molding of the primary bobbin 
{ HEAD ~ The secondary core } is preferably secured to the primary bobbin by the insert resin molding process at { TAIL ~ the time } of molding of the primary bobbin
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH