4 янв 1856 г. - Pneumatic post was developed
Описание:
Pneumatic post created another way for letters to be delivered quickly between recipients. A pneumatic post utilisez underground pressurized air tubes to carry capsules from on area to another.Добавлено на ленту времени:
Дата:
4 янв 1856 г.
Сейчас
~ 169 г назад