Besides, high strength polyester fibers and ultra high molecular weight silicone are used as modifiers for PVC-U compounding systems for the first time, and their modification effects are involved.
同时还首次使用高强度聚酯纤维和超高相对分子质量聚硅氧烷树脂作为PV C - U体系的改性剂，并探讨了各自的改性效果。
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The six — wavelengths pyrometers with six interference filters for effective wavelength defined and with optical fibers for beam split were developed by the U. S. and CEC scientists inl980's.