在线免费观看亚洲av,欧美午夜不卡精品综合,黄视频在线免费看,88re久久精品国产,无遮挡很黄很黄在床视频女,欧美日韩国产精品综合视频,一级黄色毛片在线免费观看

      Synda Steel Pipe Group Co., Ltd. was established in July 2003 and is located in Cangzhou Economic Development Zone, Hebei Province, China. It covers an area of 400,000 square meters and has a registered capital of 181 million yuan. It is an industrial and commercial enterprise that integrates the production and anti-corrosion processing of spiral steel pipes, as well as the operation and sales of seamless steel pipes, coils, strip steel and other types of steel. The company currently has over 400 employees, including more than 120 personnel with intermediate and senior technical titles.