{HEAD ~ An electroconductive resin composition} comprising 100 parts by weight of thermoplastic resins and thermosetting resins and {TAIL ~ 15 to 150 parts} by weight of carbon black having a DPB oil absorption amount of 400 ml/100 g or more and expanded graphite having an average particle size of 40 μm or more, wherein the expanded graphite content is 40 to 90% by weight of the total amount of the carbon black and the expanded graphite 
{ HEAD ~ An electroconductive resin composition } comprising 100 parts by weight of thermoplastic resins and thermosetting resins and { TAIL ~ 15 to 150 parts } by weight of carbon black having a DPB oil absorption amount of 400 ml/100 g or more and expanded graphite having an average particle size of 40 μm or more , wherein the expanded graphite content is 40 to 90 % by weight of the total amount of the carbon black and the expanded graphite
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