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During WWI, fans were hard to make due to brass shortages from ammunition production (19 nov 1914 anni – 19 marzo 1918 anni)

Aggiunto al nastro di tempo:

Heat Control Devices of the Past

24 nov 2017

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534

Data:

19 nov 1914 anni

19 marzo 1918 anni

~ 3 years and 3 months

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