权威例句
Semaphore-signalSemaphore-signalSemaphore signalRailway SignalRailway Semaphore SignalInternational maritime signal flagsRailway semaphore signalALEUT SEMAPHORE SIGNALSA man standing barefoot on a plank of wood painting a semaphore railway signal, with a man on ladder and a supervisor standing below...Semaphore signalsSEMAPHORE SIGNALS DANCE UMBRELLA'S OPENINGTHE COAST SIGNAL STATIONS AND THE SEMAPHORE TELEGRAPHFear of the unknown: a history of wireless ... Part one: in an era where battlefield Signals were passed on by semaphore, heliograph...
