日本不卡高清视频v中文字幕观看互动交流_手机在线看片欧美日韩_日韩激情一级无码毛片_国产真实尾随入室迷晕丝袜美女_久久天天躁狠狠躁夜夜免费观看

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.