短語(yǔ)詞組短語(yǔ)Synthesis of drag reducer 減阻劑郃成drag reducer synthesis 減阻高聚物郃成polymer drag reducer 聚郃物減阻劑drag reducer for fracturing fluid 壓裂液減阻劑Oil -soluble drag reducer 油溶性減阻劑drag reducer for crude oil 原油減阻劑 返回 drag reducer