InMarchof1895,CharlesFrancisJenkins,ayounggovernmentcle...
问题详情：InMarchof1895,CharlesFrancisJenkins,ayounggovernmentclerkinWashingtonenteredintoanagreementwithThomasArmat,afellowstudentattheBlissSchoolofElectricity.Theiraimwastodevelopamotionpicturedevice(...