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 35CrMoA produced by XINGTAI STEEL has stable composition, low harmful elements, small decarburization layer, few surface defects, and excellent plasticity and ductility. It is generally used to produce 10.9 grade high-strength fasteners. A customer of XINGTAI STEEL used this steel grade to produce bolts for nuclear power. The customer reported that the product had high strength and low cracking rate in cold heading, which met product usage requirements.