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7

The Step by Step Switch

Prikolica
This AT&T informational film describes in detail how step-by-step switches work, and demonstrates their real-time operation by calling a 5-digit phone number from another dial telephone.
Udio:
 
 
 
 

Žanr: Documentary

Uloge:

Posada:

Zemlja: United States of America

Vrijeme izvođenja: 8 minuta

Kvaliteta: HD

Otpustite: 1951

imdb rating 7

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