10 апр 1853 г. - Elisha Otis creates the Elevator safety break
Описание:
People worried about elevator cars falling so the elevator safety break was developed. This reassured people of safety and led to the further adoption of the elevator.Добавлено на ленту времени:
Дата:
10 апр 1853 г.
Сейчас
~ 172 г назад