A new kind of moulding sand adhesive used for casting industry was prepared from distillation test residue of cottonseed oil fatty acid.

 
  • 采用精制棉油脂肪酸蒸餾過(guò)程中排出的蒸餾殘渣為原料,制備一種新型型砂鑄造用粘結劑。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan