中文字幕精品一区二区精品,乱码av午夜噜噜噜噜一,日韩精品久久久久久久电影竹菊,欧美一区二区三区在线播放,日韩av中文字幕在线,久久r久久,亚洲男人天堂2024

Casus Products>> Casus

  The G33B2-B produced by XINGTAI STEEL has the advantages of stable composition, high purity of steel, small decarburization layer, low cracking rate of cold heading, low original hardness of wire rod, high strength and good hardenability after heat treatment. A customer of XINGTAI STEEL use this product to produce high pressure nozzle of cylinder, feedback the product quality stability, meet the use requirements.