SCIENCE AND EDUCATION FILM: Telephones of various types
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SCIENCE AND EDUCATION FILM: Telephones of various types
Education
Length:
00:25:50
Date:
1991/03/05
Collection
Keywords:
Industrial Technology | Means of Communication | Telecommunication Equipment | Telephone | Telephone Communications | Manual Connection Telephone | Rotary Dial Telephone | Program-Controlled Telephone |
Telephones of various types focuses on the evolving process of telephones and various kinds of program-controlled telephone.