{HEAD ~ The driving mechanism} rotates the tubular member and {TAIL ~ electrode} about the elongated axis of the tubular member 
{ HEAD ~ The driving mechanism } rotates the tubular member and { TAIL ~ electrode } about the elongated axis of the tubular member
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH