短語(yǔ)詞組短語(yǔ)delay disconnect signal 延遲切斷信號(hào);延遲拆線(xiàn)信號(hào)trunk disconnect signal recognition 中繼線(xiàn)斷開(kāi)提示信號(hào)signal disconnect 拆線(xiàn)信號(hào) 返回 disconnect signal