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