短語詞組短語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 上向單臂板信號(hào)機(jī) 返回 semaphore arm