草久久精品,成人久久亚洲,日本一道本在线视频,国产精品99一区二区,一区二区三区综合,久久精品5,自拍偷拍你懂的

Casus Products>> Casus

  The QSAE10B35-B produced by Xingtai steel has stable chemical composition, good surface quality and high purity of steel. It can be used to produce 10.9 high strength bolts and other cold heading parts. A customer of Xingtai steel using this product to make clutch sleeve, used to replace imported materials. Customers reflect the product performance stability, low harmful elements, good cold heading performance, can meet the final product requirements.