Wool will dissolve in caustic soda solutions that would have little effect on cotton.

 
  • 在苛性鈉溶液中羊毛會(huì )溶解,而苛性鈉對棉的作用卻很
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan