One of the main methods to test the gas permeability is using partial pressure difference.
用压差法测试塑料薄膜的透气性，是一个长期使用的主流测试方法。
There exist big differences in studied result with different test methods for dense reservoir rock in low permeability gas pool is sensitive to the stress.
致密低渗气藏开发过程中储集层存在应力敏感，不同的试验方法评价结果差异很大。
The results of the test have shown that the operating technology for colloidal silicate binding is comparatively simple and the strength and gas permeability of the mold are comparatively good.
通过与硅酸乙酯水解液粘结剂的比较表明，以硅溶胶作为透气性金属陶瓷材料的粘结剂，其材料的制造工艺简单、 强度较高、透气性较好。
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