论述了杂质渗入到多孔薄膜后，薄膜中的杂质浓度分布的理论解释，给出了对实际工艺的指导性结论。
In this paper, we discussed the concentration distribution of extrinsic materials in the thin film with multiple holes, and gave its particular application.
采脂时，将盖封闭盖住脂液，避免了杂质的渗入和脂液的挥发。
During resin tapping, the cover is closed to cover resin liquid to avoid the infiltration of impurities and the volatilization of the resin liquid.
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