Silica gel column chromatography and solvent extraction were used to separate grease and abradant in a kind of excellent polishing paste for plastics, respectively.
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。
When pressure meters are used in such circumstances, lubricating grease glycerin or silica gel oil cannot be filled inside. Please contact with manufacturer for proper in-filled oil.
当压力表用于这些场合时均不能充润滑脂甘油或硅油，请与厂家联系，充填正确的内充油。
When pressure meters are used in such circumstances, lubricating grease glycerin or silica gel oil cannot be filled inside. Please contact with manufacturer for proper in-filled oil.
当压力表用于这些场合时均不能充润滑脂甘油或硅油，请与厂家联系，充填正确的内充油。
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