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