The paper introduces mainly the PTFE forming technology, filled and modified grades and its application in the sealing.

主要介绍PTFE的成型工艺、填充改性品级及其在密封上的应用。

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This paper discussed the influence of the formulating ratio and processing condition of the ACR modified PVC and its filled compound on the impact strength of these polymers.

本文研究了丙烯酸酯共聚物(acr)改性聚氯乙烯(pvc)及其填充复合物的配料比和加工条件对冲击强度的影响。

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Then base on equal time-interval GM (1,1) model, and take the variation of embankment load into consideration, a modified GM (1,1) model is put forward for embankment filled with uniform ground soil.

以相同观测时段的GM（1，1）模型为原型，考虑荷载变化，针对地基土体均匀的情况，提出了GM（1，1）修正模型。

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Packages covered with a sealed layer of clear plastic are modified-atmosphere packages, which have a gas-filled space inside to help preserve freshness and color.

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