The main application of PEN is film, fiber and vessel. Using the modified method, the use cost can be saved.
主要用项是化学薄膜，纤维、容器等，采取改性方法，可降低使用成本。
The high-pressure composite vessel usually consists of the inner metal liner and outer winding graphite fiber reinforced plastic with high strength.
该复合容器通常由金属内胆和外层缠绕的高强度纤维增强复合材料组成。
Variance analysis showed that the fiber and xylem ray proportion among populations were insignificant, but the vessel-elements proportion varied greatly.
方差分析表明，种群间导管比量差异显著，木射线比量和纤维比量差异不显著。
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