婷婷五月伊人,亚洲国产精品免费,日韩午夜福利在线观看,一区二区午夜按摩,久久精品国产免费,国产免费a级片全部,成人黄片在线播放

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.