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