分别采用硅胶柱色谱法和溶剂抽提，分离优质塑料抛光膏中的油脂和磨料部分。
Silica gel column chromatography and solvent extraction were used to separate grease and abradant in a kind of excellent polishing paste for plastics, respectively.
新加坡公司求购刚玉砂，天然金刚砂，天然石榴石，天然磨料，氧化铝，塑料废料，塑料切片。
Emery, Natural Corundum, Natural Garnet, Natural Abrasives, Aluminum Oxide, Waste Of Plastics, Parings Of Plastics, Iron.
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