Nauka i Technika - Inventions

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Question Answer
prąd zmienny
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alternating current
soczewki kontaktowe
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contact lenses
proch (strzelniczy)
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gunpowder
silnik spalinowy
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the internal combustion engine
silnik odrzutowy
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the jet engine
układ scalony / mikrochip
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the microchip
prasa drukarska
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the printing press
maszyna parowa
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the steam engine
koło
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the wheel

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