InMarchof1895,CharlesFrancisJenkins,ayounggovernmentcle...
問題詳情：InMarchof1895,CharlesFrancisJenkins,ayounggovernmentclerkinWashingtonenteredintoanagreementwithThomasArmat,afellowstudentattheBlissSchoolofElectricity.Theiraimwastodevelopamotionpicturedevice(...