久久中文字幕一区二区三区,日本99热,高清av一区,日韩狠狠操,久久久一本精品99久久精品66,1级片网站,aaaaaaa欧美黄色大片

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.