久久一日本道色综合久久不,99久久无码一区人妻A黑,国产精品爆乳在线播放,国产精品一区无码专区

  • <b id="9ocva"></b>
  • <blockquote id="9ocva"></blockquote>
    Casus Products>> Casus

      The QML20Cr produced by XINGTAI STEEL has characteristics of stable chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality. After spheroidize annealing, this product has characteristics of good cold heading properties ,stable heat-treatment properties and good hardenability. A customer of XINGTAI STEEL used this material to make seat gear and fed back that the product quality was stable and met the product demand.