av免费不卡在线观看网址,黄色视频大全ww,h在线观看网站,亚洲视频在线免费观看,男人天堂视频在线播放,日本女同羞羞视频,jk美女隐私视频网站

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.