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OpenStudy (anonymous):

which inventions do you think had the greatest impact in the long term, either directly or indirectly?

OpenStudy (balala):

The inventions of usable electricity, steel, and petroleum products during the 19th century lead to the successfullness of today lol :P

OpenStudy (balala):

thx for the medal bro :3

OpenStudy (anonymous):

no prob man

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