{HEAD ~ Switches} are provided for producing {TAIL ~ signals} representing a selection of one of the synchronizing device, and a control circuit is responsive to the signals for operating the electric actuator to select one of the synchronizing devices 
{ HEAD ~ Switches } are provided for producing { TAIL ~ signals } representing a selection of one of the synchronizing device , and a control circuit is responsive to the signals for operating the electric actuator to select one of the synchronizing devices
HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH