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Fans with overlapping blades were invented (30 сент 1920 г. – 30 сент 1930 г.)

Добавлено на ленту времени:

Heat Control Devices of the Past

24 ноя 2017

0

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534

Дата:

30 сент 1920 г.

30 сент 1930 г.

~ 10 years

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