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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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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
By
Eric Wang
24 ноя 2017
0
0
537
Дата:
30 сент 1920 г.
30 сент 1930 г.
~ 10 years
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