The utility model relates to a filter, comprising at lest one filtering unit, the filtering unit is provided with a filtering channel, the filtering channel is provided with an inlet and an outlet, the utility model is characterized in that the filtering unit comprises at least one groove, the groov.....
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一、项目基本情况 非均相催化法制备生物柴油，是通过自主研发的非均相催化剂制备生物柴油。 目前已经合成近四十种具有杂多酸结构的催化剂，在生物柴油催化剂合成和物理化学性质方面研究有着良好的基础。项目开发的基于杂多酸和水滑石为主要活性成分的纳米固体酸碱催化剂，具有高比表面积、高催化活性，用量少，催化效率高，基本没有环境污染的优势。研究发现固体酸碱催化剂与反应物形成非均相反应体系，容易分离、无设备腐蚀和环境污染，且易回收、可重复使用、可实现连续生产等优点。 二、合作方式 项目前期已经合成了近四十种具有杂多酸结构的催化剂，完成实验室小试，截至2012上半年，项目.....
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Mode photonic crystal fiber comprises a core of a substantially transparent material having a core. Said core material having a core refractive index and length, and having a core diameter. Surrounding said optical fiber further comprises a core material at the outer cladding region. The cladding re.....
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一种测试纺织品刚度的装置，包括一带有沿立柱延伸的刻度和在立柱顶部的支撑表面的立柱。在立柱上连接有构件。该构件带有沿与立柱垂直的方向延伸的刻度。构件可以沿立柱滑动和固定在立柱上。一重物放置在纺织品样品上以便将样品固定在适当位置。测试方法包括将纺织品样品放置在表面上并使纺织品样品的一部分延伸超过表面边缘。然后构件上升到支撑样品的位置，再下降到样品不再受到支撑的位置。从水平和垂直刻度读出读数用于计算。
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The present invention provides a novel potassium-sodium niobate zirconium barium titanate series leadless piezoelectric ceramic composition which comprises perovskite type piezoelectrics KNaNbO3 and strong ferroelectrics Ba(TiZr)O3, the general formula is represented by (1-z)(KNa)NbO3-zBa(TiZr)O3, i.....
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