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首个成功的商用产品是由麻省理工学院的毕业生HiramPercy于1909年专利研制的。
The first commercially successful product was patented by MIT grad Hiram Percy Maxim in 1909.
youdao
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首个成功的商用产品是由麻省理工学院的毕业生HiramPercy于1909年专利研制的。
The first commercially successful product was patented by MIT grad Hiram Percy Maxim in 1909.
youdao