程控交换机 chéngkòngjiāohuànjī electronic switching system Definitions Defs Origin Strokes Stroke Words Sentences Sents 程控交换机 程控交換機 chéngkòngjiāohuànjī electronic switching system stored program control exchange used in telecommunications
程控交换机 程控交換機 chéngkòngjiāohuànjī electronic switching system stored program control exchange used in telecommunications
