generated at
flag semaphore
手旗信号
Flag signals
Heliograph
International Code of Signals
International maritime signal flags
Railway signalling
Aircraft marshalling
Optical landing system
Semaphore line
Signal lamp
Substitute flag
Traffic guard

googleflag semaphore
Google画像検索flag semaphore
Google定義検索 flag semaphore
wikipediaflag semaphore
weblio flag semaphore
kotobank flag semaphore
jisho flag semaphore