skos:altLabel | - flags
- Signal
- signal flags
- signaling
- signalling
- Semaphore
- Signaling
- semaphore
- Flag semaphore systems
- Flag_semaphore#Japanese_semaphore
- Semaphore flags
- flag semaphore
- passing signals
- semaphore code
- semaphore communication
- semaphore flag
- semaphore flag signaling
- semaphore flags
- semaphore signals
- semaphore station
- semaphore towers
- semaphore-flag
- semaphore-signal flags
- semaphores
- semaphoric
- semaphoring
- two-arm semaphore
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