<i id="exvux"></i>
    1. <b id="exvux"></b>

      Main Products
      Products Grade: 42Cr9Si2,45Cr9Si3,40Cr10Si2Mo
      Specifications: φ5.5-φ16mm
      Applied Standard:  agreement
      Characteristics: Engine Valve
      Applications: high-end parts
      Use of Products: Engine Valve steel with high strength, high temperature resistance, used in the production of engine intake and exhaust valves and other high temperature resistant parts.
      欧美日韩一区二区三区免费,久久国产视频一区,国产日韩欧美视频,色婷婷激婷婷深爱五月老司机