{HEAD ~ The mean particle size} of carbon black is preferably {TAIL ~ 0.01 to 0.1 μm} also for formation of the favorable electroconductive network 
is preferably
{ HEAD ~ The mean particle size } of carbon black is preferably { TAIL ~ 0.01 to 0.1 μm } also for formation of the favorable electroconductive network
HEAD 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