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