Dust core with specific relationship between {HEAD ~ particle diameter} and {TAIL ~ coating thickness}, and method for producing same 
Dust core with specific relationship between { HEAD ~ particle diameter } and { TAIL ~ coating thickness } , and method for producing same
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH