It reviewed the key points of processing technique and equipment for plastic double-walled corrugate pipe at home and abroad.

论述了国内外塑料双壁波纹管成型工艺和成型设备的技术要点。

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The piece has a yellow painted trumpet neck and a double-walled construction, meaning an inner vase can be seen through the perforations of the main body.

它被称作是“一件展示了陶艺和绘画工匠的高超技能的精致工艺品”，黄色的喇叭瓶口和双层瓶壁的构造，意味着可以透过瓶身上的齿孔看见内层瓶壁。

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The band structure model of commensurate double-walled carbon nanotube (DWNT) was built by using tight-binding Hamiltonian with curvature effect included.

采用紧束缚能带理论，利用所提出的考虑卷曲效应的紧束缚能量哈密顿量，建立了公度双壁碳纳米管（DWNT）的能带结构模型；

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The screen stops well above the sidewalk, revealing V-shaped concrete supports and a glass-walled ground floor with views of a double-height sunken gallery inside.

WSJ: Cooper Union's New Building, at 41 Cooper Square | By WSJ Architecture Critic Ada Louis Huxtable