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会议电话远程控制的初步实施

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Bibliographic Details
Main Authors: 杨正光 (著)
Published: 郑州铁路局科学技术研究所
Publisher Address: 郑州
Publication Dates: 1963
Literature type: Book
Language: Chinese
Subjects:
铁路通信—会议电话—遥控
会议电话—铁路通信—遥控
遥控—会议电话—铁路通信
Carrier Form: 16页: 图 ; 26cm
Index Number: U285
CLC: U285.12
Call Number: 442.55/4919
Contents: 内部资料

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