亚洲裸体视频,一级毛片在哪里看,国产素人在线,国产精品丝袜久久久,亚洲无砖砖区一二区免费,亚洲а∨天堂久久精品喷水,91网站在线播放

Casus Products>> Casus

  The SCM435-M produced by Xingtai steel is a series of simplified annealing products developed to meet the needs of market development. It is mainly used to produce 10.9 grade high strength fasteners. SCM435-M has lower hardness and better cold heading performance than ordinary SCM435. The customer reflects that the material can simplify the annealing process, reduce the production cost, and completely meet the requirements.