Thus, no influence is exerted on rotation of the rotatable electrode means by {HEAD ~ frictional force} caused by {TAIL ~ such a collector} or brush 
caused by
Thus , no influence is exerted on rotation of the rotatable electrode means by { HEAD ~ frictional force } caused by { TAIL ~ such a collector } or brush
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH