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