Switches are provided for producing {HEAD ~ signals} representing {TAIL ~ 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 
representing
Switches are provided for producing { HEAD ~ signals } representing { TAIL ~ 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
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL 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