Tubes Pneumatiques - Rorpost - Potrubni Posta - Pneumatica

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10 Boys in an elevator or 1 pneumatic tube system? 10 Boys in an elevator or 1 pneumatic tube system?

Advertisement from the International Telephone and Telegraph Corporation in 1965

This 'office boy' travels 25 ft. per second This 'office boy' travels 25 ft. per second
Advertisement from the International Telephone and Telegraph Corporation in the Science American, 1957