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