Formation of Strowger Automatic Telephone Exchange.
史端乔式自动电话交换机形成。
CK series Marine automatic telephone system is application for all kinds of vessels; It support automatic exchange service for auto telephone.
CK系列船用程控电话系统是为大、中、小型舰船提供整船内部电话服务的设备。
CK series Marine automatic telephone system is application for all kinds of vessels; It support automatic exchange service for auto telephone.
CK系列船用程控电话系统是为大、中、小型舰船提供整船内部电话服务的设备。
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