A glass container holding gas at low pressure and enclosing a thin metal filament that emits light when an electric current is passed through it.

 
  • 在低壓下容納氣體的玻璃容器密封一個(gè)金屬細絲,當通過(guò)電流時(shí)可以產(chǎn)生光。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan