国产午夜一级,欧美三级午夜理伦三级在线观看,国产精品另类激情久久久免费,一级毛片免费高清,99精品黄色,日韩超级大片免费看国产国产播放器,亚洲精品日韩一区二区电影

Steel-making Plant Succesfully Produce U187 Steel
  Updatetime:2013-02-01 Hits:

 a few days ago, based on the test plan made by the technology center, the steel-making plant succesfully produce U187 steel.  

  U187 steel is a high-end steel grade developed by the bridge rope project team of the company. Featuring high carbon, high silicon and micro alloy, this kind of steel has greater mechanical strength. The the strength of zinc-plate wire rope, which use U187 steel as material, can reach 1860Mpa, insured the bridge load bearing.

  The technicians of technology center and steel-making plant involved in the whole production process. After sample analysis, the products were consisdered suitable for the next rolling process.