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