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