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