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Pneumatic Tube Articles about "Philadelphia"

Pneumatic Tube Mail in the United States of America 18-01-2019   20-01-2019
The essential features of a Pneumatic Tube Line are four... A suitable conduit, or tube; a carrier for passing through the tube; a transmitter, or device for dispatching the carrier; and a receiver, or apparatus for arresting the carrier and delivering it from the line. 23-12-2018   24-12-2018
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