乙烯的

Objective: To evaluate the effects of expanded polytetrafluoroethylene barrier membrane in guided periodontal tissue regeneration .

目的：观察国产膨体聚四氟乙烯膜运用于引导牙周组织再生技术的临床效果。

The pyrolysis characteristics of polytetrafluoroethylene were studied in the atmosphere of nitrogen by thermogravimetric analysis.

采用热重分析法，研究了聚四氟乙烯在氮气气氛下的热裂解特性。

OBJECTIVE: To explore the possibility of repair of the extensive bile duct injuries with expanded polytetrafluoroethylene.

目的 探讨膨体聚四氟乙烯修复胆管缺损的可能性。

Polytetrafluoroethylene fluoroplastics are an important species, at PTFE in the CF bond can be particularly high stability.

聚四氟乙烯是氟塑料中的一个重要品种，在PTFE中C-F键键能高特别稳定。

The invention relates to polytetrafluoroethylene composite film filtering materials for air filtering industry.

本发明涉及空气过滤行业用聚四氟乙烯复合膜的过滤材料。

This paper introduces the wet-granulated polytetrafluoroethylene resin about the application field,technology of preparation,character and market information.

叙述了聚四氟乙烯湿法造粒料的应用范围、制造方法、性能特征以及前景展望。

The present invention relates to a polytetrafluoroethylene tube, and more particularly to a PTFE tube for a flexible hose.

本发明涉及聚四氟乙烯管，尤其涉及用于柔性软管的PTFE管。

Objective To seek a method for reducing postoperative infection of augmentation rhinoplasties with Expanded polytetrafluoroethylene.

目的：寻找一种降低膨体聚四氟乙烯隆鼻术后感染发生率的方法。

Examined is the initiation mechanism of flashover along the surface of polytetrafluoroethylene under AC voltage in vacuum.

以聚四氟乙烯为例研究了交流电压下聚合物绝缘材料在真空中沿面闪络发生前的表面发光特性。

Expanded Polytetrafluoroethylene has particular network structure and stable chemical property which make it useful for hazarded heard repairing.

膨体聚四氟乙烯具有独特的结构和性能，生物相容性良好，非常适合作脏器修补材料和整形外科材料。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。