久久中文字幕久久无码,亚洲日韩va一区二区三区,99re6在线观看国产精品,成人国产精品秘 果冻传媒在线

  • <video id="boa4d"><mark id="boa4d"><noframes id="boa4d"></noframes></mark></video>
  • <b id="boa4d"><acronym id="boa4d"></acronym></b>
    <var id="boa4d"><track id="boa4d"><ins id="boa4d"></ins></track></var>

    <video id="boa4d"><mark id="boa4d"></mark></video>
    <u id="boa4d"></u>

    1. Main Products
      Products Grade: 35VB
      Specifications: φ16~38mm
      Applied Standard:  agreement
      Characteristics: The wire rod is used to produce high strength bolt for steel structure of class 10.9.
      Applications: Common partsFastener steel
      Use of Products: 35VB ,which is mainly used to produce high strength bolt for steel structure of class 10.9. has characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality, good cold heading property,stable quality of heat treatment , good hardenability and uniform hardness.