呼喚信號 (fu1 wun6 seon3 hou6) — call sign in Cantonesefuˉ¹呼wunˍ₆喚seon˗₃信houˍ₆號简 呼唤信号Mandarin Pinyin: hu1 huan4 xin4 hao4Meaning of 呼喚信號nouncall sign