研究表明纳米管帽的尺寸效应可以看成为一定长度管壁的简单延伸，揭示了含帽与不含帽纳米管电子结构之间的相似性。
For the cap of nanotube, it can be seen as the prolongation of the tube wall, therefore, the electronic structures of tube with capped ends are close to the tube with open ends.
分析了塑料us B帽的工艺特性，详细论述了US B帽模具结构设计和工作过程。
The technique traits of a plastic USB cap is analysed, and the structure design and working process of the USB cap injection mold is expatiated.
分析了塑料us B帽的工艺特性，详细论述了US B帽模具结构设计和工作过程。
The technique traits of a plastic USB cap is analysed, and the structure design and working process of the USB cap injection mold is expatiated.
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