Home / Standards / GB/T 44751-2024 GB/T 44751-2024 Active Fine ceramics—Silicon nitride materials for rolling bearing balls and rollers 精细陶瓷 滚动轴承球及滚子用氮化硅材料 Standard Type GBT ICS 81.060.30 CCS Q 32 Status 现行 Issue Date 2024-10-26 Implementation 2025-05-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A