精品国产精品三级精品AV网址,国产一区二区女内射,人妻射精一区二区

Shengli Xinda New Materials Co., Ltd. is one of the top three comprehensive strength enterprises announced by the China Composite Materials Industry Association, recognized by the Ministry of Industry and Information Technology as the champion of the composite material science oil pipeline industry, a national intellectual property demonstration enterprise, and an award-winning unit of the 5th Dongying City Mayor's Quality Award. It has a CNAS nationally recognized laboratory, a provincial-level demonstration engineering technology research center, an engineering technology center, and an enterprise technology center Provincial level scientific and technological innovation platforms such as postdoctoral innovation funding bases.