搜索: 资料名称 作者 主题 系列 图书编目号码 起始字母为: 10 20 30 50 100 每页 < 前 10 个标题 后 10 个标题 > 浏览标题 # Telecommunication -- Switching systems 1 SEE ALSO narrower term: Packet switching (Data transmission) 1 Telecommunication -- Switching systems -- Examinations -- Study guides 6 Telecommunication systems 2 SEE ALSO narrower term: Broadband communication systems 2 SEE ALSO narrower term: Data transmission systems 2 SEE ALSO narrower term: Multimedia communications 2 SEE ALSO narrower term: Telephone systems 2 SEE ALSO narrower term: Teleshopping 13 SEE ALSO narrower term: Voice mail systems 2 SEE ALSO narrower term: Wireless communication systems 33 Telecommunication systems -- Design. 1 Telecommunication systems -- Drama. 3 Telecommunication systems -- History. 1 Telecommunication systems -- Social aspects -- United States -- History. 1 Telecommunication systems -- United States -- History. 1 Telecommunication -- Technological innovations 1 Telecommunication -- Technological innovations -- Juvenile literature. 1 10 20 30 50 100 每页 < 前 10 个标题 后 10 个标题 >