GB/T 38885-2020超高洁净高碳铬轴承钢通用技术条件标准
英文:General specification for ultra-high cleanliness of high carbon chromium bearing steel GB/T 38885-2020介绍: 国家标准《超高洁净高碳...
英文:General specification for ultra-high cleanliness of high carbon chromium bearing steel GB/T 38885-2020介绍: 国家标准《超高洁净高碳...