单词：fire retardancy
fire retardancy的用法和样例：
例句
- Expanded perlite's light weight, low density, porosity, fire resistance, and the strength of particles have secured its use in a wide range of products.膨胀珍珠岩的轻质，低密度，多孔性，防火性以及强度保证了应用的广泛性。
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