Design and key technology of doublewall steel cofferdam for Anqing Bridge over Yangtze Rive
安庆长江大桥双壁钢吊箱围堰设计与关键施工技术
The doublewalled cap is injection moulded in polypropylene and is completed with an EPE wad.
双薄壁注塑瓶盖是在聚丙烯和完成的珍珠棉瓦德。
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