OBJECTIVE: to explore the role of the tube structure changes in Nitinol alloy composite artificial esophagus to prevent trachea cannula exodus.
目的：观察改变镍钛合金组合式人工食管的管体结构在防止脱管中的作用。
The structure, property, partition, process and market analysis for the al plastic composite tube are described in this paper, and this product's technical economical cost are evaluated.
本文论述了铝塑复合管材的性能、工艺技术进展，阐述了国内外铝塑复合管材的市场动态，并对该产品的经济效益进行了分析。
The invention relates to a composite cylinder with steel tube concrete frame, steel frame and concrete, and the manufacturing method, belonging to a cylinder structure and the manufacturing method.
钢管混凝土边框―钢桁架―混凝土组合筒体及制作方法，属于一种筒体 结构及制作方法。
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