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9 июл 1920 г. - Quartz clock invented in America

Описание:

Used vibrations and the electric properties of quartz to keep time.

Добавлено на ленту времени:

clocks

ByLogan Nelson
14 сен 2017

Дата:

9 июл 1920 г.
Сейчас
~ 103 г назад

Изображения:

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