When the opening portion of the casing is closed with the closing member, both end faces in the longitudinal direction of the secondary core formed in {HEAD ~ the primary bobbin face} to {TAIL ~ the inside peripheral surfaces} of the primary core 
When the opening portion of the casing is closed with the closing member , both end faces in the longitudinal direction of the secondary core formed in { HEAD ~ the primary bobbin face } to { TAIL ~ the inside peripheral surfaces } of the primary core
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH