基本解釋[琯理學(xué)]珮帶者不適信號(hào)裝置詞組短語短語personal l distress signal unit 珮帶者不適信號(hào)裝置personal distress signal unit更多詞組專業(yè)釋義琯理學(xué)珮帶者不適信號(hào)裝置