堵塞与防治
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Sand prevention and plugging agent 防砂堵水剂
plugging off and channelling prevention 封堵封窜
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Therefore a new type of sand prevention and water plugging agent was studied in this paper. The new agent can prevent sand effectively, but also plug water with high selectivity.
研究将防砂堵水工艺合二为一的新型防砂堵水剂，既能有效防砂，又有选择性堵水效果。
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