短語(yǔ)詞組短語(yǔ)enamelled semaphore arm 搪瓷臂板supplementary semaphore arm 臂板信號(hào)機(jī)的輔助臂板arm semaphore 號(hào)志臂木double -arm semaphore 雙臂板信號(hào)機(jī)upper quadrant single -arm semaphore signal 上曏單臂板信號(hào)機(jī) 返回 semaphore arm