토머스 에디슨: 두 판 사이의 차이

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** If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found the object of his search. [...] I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor. — Nikola Tesla
 
[[분류:발명가|에디슨, 토머스 앨바]]
 
[[bg:Томас Алва Едисън]]

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