The power supply 69 may be connected to the conductors 56 that are connected to {HEAD ~ the actuator} 68 and may also be connected to the conductors 56 in {TAIL ~ the interior} of the tube 50 
The power supply 69 may be connected to the conductors 56 that are connected to { HEAD ~ the actuator } 68 and may also be connected to the conductors 56 in { TAIL ~ the interior } of the tube 50
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH