In {HEAD ~ the side wall} of the casing is formed {TAIL ~ a rectangular opening portion} which opens at the top end; and on the primary bobbin a rectangular closing member is formed integrally therewith 
is formed
In { HEAD ~ the side wall } of the casing is formed { TAIL ~ a rectangular opening portion } which opens at the top end ; and on the primary bobbin a rectangular closing member is formed integrally therewith
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH