久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

Light Bulb (19th Century)

While Thomas Edison is often mentioned as the inventor of the light, historians Robert Friedel and Paul Israel cite at least 22 earlier inventors. Edison's version (pictured) was able to transcend others because of some key details, including finding an effective incandescent material and being able to achieve a higher vacuum and a high resistance.

電燈泡（19世紀）

人們經常提到，托馬斯?愛迪生發明了電燈泡，而歷史學家羅伯特?弗里德爾和保羅?伊斯里爾提到了至少22種更早的類似發明。愛迪生的發明版本能夠從中勝出是由于一些關鍵的細節，包括找到了一種有效的發白熱光的材料，燈泡內能夠達到較高程度的真空和高電阻。