The Step by Step Switch

The Step by Step Switch

The Step by Step Switch


(6 de 35 utilisateurs)

0h 08m 1951 HD

the step by step switch (1951) Gratuits en Français, streaming VF the step by step switch 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.

The Step by Step Switch (1951)
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