An achromatic lens system may consists of several cemented or separated groups of orown and flint glasses.

 
  • 一個(gè)消色差的透鏡系統可由若干個(gè)互相貼合的或互相分離的、由冕玻璃和火石玻璃組成的組元組成。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan