By the end of 1880, Edison had produced a 16-watt bulb with a special carbonized cotton filament that could last 1,500 hours.

 
  • 1880年末,爱迪生终于利用特别碳化棉做灯芯,创制了一个16瓦特灯泡,用上1,500小时。
今日热词
目录 附录 查词历史