Novel Settings - 5.2.4.2.1

With the expansion of the city, the demand for the delivery of small objects and letters has increased. Finally, this problem was solved through high-pressure air. A large number of pipes were spread throughout the city. After paying the fee, you will get a metal ball with a diameter of about ten centimeters, put the letters and the items to be sent in and return them to the personnel at the depot.

The personnel at the sending and receiving station will put the metal balls into the waiting area, and every half an hour (the specific time is determined by the size of the city, generally no more than one hour). The plate reseals the pipe, and the high pressure air blows into the pipe to send the metal ball out.

The metal balls will go through complicated pipelines to the central distribution station. If the city is large enough, there will be multiple distribution stations. The staff of the central distribution station or the mechanical computer (depending on the level of the city's power tower) will distribute the metal balls. into the pipes corresponding to different transceiver stations, then close the pipes again, and blow out high-pressure air.

The rhythm of receiving/delivering in half an hour and sending in half an hour makes the metal balls carry countless information flowing under the ground of the city. If the steam is the blood of the city, then they are the nerve signals of the city.

Some people even set up their own independent object delivery system, but the operation and construction costs of this thing are far beyond ordinary people's imagination.

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