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Homeby Witness Moecki
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RE: Thomas Edison's Home 爱迪生的故居

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nationalpark (63)in #cn • 7 years ago

是啊。仅仅那个灯泡就可以吃好几辈子。不过专利只有十几年。不像版权可以几十年

7 years ago in #cn by nationalpark (63)
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