亚洲色图欧美色,久久不射电影,欧美激情手机在线,好看的一级毛片,亚洲狼人区,天天爱天天做天天爽,91欧美日韩

Xingtai Steel high carbon chromium bearing steel GCr15, mainly used in the manufacture of rolling bearings of rolling body and ring.The chemical composition of bearing steel high uniformity requirements, on the content and distribution of non-metallic inclusions and carbide distribution is extremely strict requirements, such as smelting is difficult. Bearing steel GCr15 of Xingtai Steel reached the international similar product level, was awarded the annual Metallurgical Products Gold Award and Metallurgy Industry High Quality Products, the quality of the product can completely meet the demand of users,got the consistent high praise ofgeneral customers.