According to the information of domestic suppliers, the manufacturing process of parts is strictly in accordance with the design standards of machinery, and the straightening roller adopts bearing steel GCr 15.

Industrial raw materials are labor objects obtained through human labor and used in industrial production process. Industrial raw materials can be divided into raw materials and materials according to their processing degree. Labor objects from mining and agriculture are called raw materials. Raw materials are called materials after further processing, such as pig iron for steelmaking. According to their different functions in the production process, they can be divided into main raw materials and auxiliary materials. The main components of the product are the main raw materials, such as cotton yarn in weaving; It is auxiliary materials that only play an auxiliary role in the process of product formation.