The force necessary to rotate the elongated tubular member 30 and thus electrode 42 is provided by {HEAD ~ an electric motor} 68 disposed within {TAIL ~ framework} 37 
disposed within
The force necessary to rotate the elongated tubular member 30 and thus electrode 42 is provided by { HEAD ~ an electric motor } 68 disposed within { TAIL ~ framework } 37
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH