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由南京铁路通信信号工程公司研制开发的ZKG—A1型微机自动控制广播系统，于1998年9月在上海站开通使用，并通过了铁道部技术鉴定。这是铁路内部首次自行设计、生产的大型客运广播系统。该系统按照铁道部颁发的“TB－1777－86铁路车站客运广播设备制式及主要技术条件”和运设[19
ZKG-A1 microcomputer automatic control broadcasting system developed by Nanjing Railway Communication Signal Engineering Co., Ltd. was put into use in Shanghai Railway Station in September 1998 and passed the technical appraisal of Ministry of Railways. This is the first large-scale passenger broadcasting system designed and manufactured inside the railway itself. The system in accordance with the Ministry of Railways issued the “TB-1777-86 railway station passenger broadcasting equipment standard and main technical conditions” and set up [19