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幸运赛车开奖信息

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ӡķ˲˹ءɭ(Chester Carlson˹ءɭ)ԭһλרʦְоԱŦԼר칫ҵĹҪƴҪļɭйؽӸļΪʹ༰ĹйPhotoconductivityʵƿ򵥵ӡѸڼгElectrophotographyʵ1938Ϊ̼רʹڸǵпƬ׷ݸӡƷʹһǵп˵һӡ֡10-22-38 Astoriaӡһ΢õƬõƬϽǿõƬߺЩֵľѷ㽫ķ۸һЩ˾̻ûȡóЧ
 
Ǹʱĸƹʹֽ̿߸ƻǶڵӸӡûǿҵ1939굽1944ѷIBMͨõڵ20˾ܾûһΪӡдг 1944һλڶݸײķӯ֯뿨ѷǩͬ¹ʱԸĽ๤1947HaloidһλŦԼĵʱֽС֯ǢBattelleԻȨۻĸӡ