97超碰人人澡人人,久久久一区二区,亚洲天堂色图片,7777精品伊人久久久大香使用方法,国产午夜一区,日韩av中文字幕一区二区,国产黄色大片儿

Casus Products>> Casus

  The SAE6150 produced by Xingtai steel has the advantages of high purity, small decarburization layer and less surface defects. It is a widely used hand tool steel at present. A user of Xingtai steel uses this material to make high quality hand tools such as hexagonal wrench,the material has high strength and hardness reflected by the user,and it meets the requirements of the final product completely.