少妇精品无码无码专区_浪伦女视频免费在线观看_在线看片无码午夜免费_五月丁香婷婷在线观看视频

Xingtai Steel has 156 patents in force until now
  Updatetime:2020-06-17 Hits:

  As the first batch of national intellectual property advantage enterprises announced by the State Intellectual Property Office, Xingtai Steel has always been promoting technological innovation based on the research concept of “accurate recognition, strict definition, fine analysis and precise improvement”. Now, Xingtal Steel could produce 3347 products which belong to 629 types of steel. Besides, 156 patents in force, including 50 patents for invention are obtained.