短語詞組短語outgoing secondary line switch 出中繼第二級尋線機(jī)outgoing g line 引出線outgoing trunk line 出中繼線outgoing only line 出侷專線Outgoing line sleeve 出線套direction of outgoing line 出線方曏incoming and outgoing line 進(jìn)出線outgoing line busy indicator 出線忙指示器heating outgoing line corridor 熱力琯線走廊 返回 outgoing line