Protein based filling agent ideally suited for all types of leather.
含蛋白质的填料剂，适用于各类皮革。
The research on the red mud for the oil-well filling agent was carried out.
本文对以赤泥为基体制备油井填充料进行了研究。
BY Series: used for pesticide and surfactant of everyday use, rubber filling agent.
BY系列：用于农药、民用两面活性剂、橡胶填充剂。
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