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 Q17Cr3-Bproduced by XINGTAI STEEL has the advantages of stable composition, low harmful elements, high purity of steel, small decarbonization layer and less surface defects. A customer of XINGTAI STEEL used the product to produce piston pin of passenger car engine, which reflected that the product was easy to spheroidize annealing, low cold heading cracking rate, stable heat treatment quality, good hardenability and uniform hardness.