短語詞組短語civil air defence door 人防隔斷門Civil Air Defence Work 人防工程civil air defence department 人民防空部門underground civil air defence 地下人防工程Chinese civil air defence 中國人民防空civil air defence works 人民防空工程;民防工程Civil Air Defence Office 人民防空辦公室civil air defence communication 人防通信city civil air defence 城市人防 返回 civil defence