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