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