以下为句子列表：
英文: Serial publication I. Sorts of fluoro resins and the discovery of polytetrafluoroethylene are introduced. Microstructure, macrostructure and dynamical, thermodynamic, radiation and chemical properties are explained.
中文: 摘要连载之一。简介氟树脂的种类和聚四氟乙烯的发现经过。阐述了聚四氟乙烯的微观、宏观结构和力学热学、辐射、化学性能。
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英文: The effect that combined mold can increase the proportion of equiaxial crystal of billet was confirmed by comparing its heat transfer character with that of traditional mold and measuring the macrostructure of the billets produced by these two molds.
中文: 摘要为了验证复式结晶器在提高铸坯等轴晶率方面的作用，分析比较了复式结晶器和传统结晶器的传热特征，并检测了两种结晶器所浇注铸坯的宏观组织。
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