Home / Standards / GB/T 9217-1988 GB/T 9217-1988 Abolished Hardmetal burrs technical specifications 硬质合金旋转锉技术条件 Standard Type GBT ICS 25.100.60 CCS J41 Status 废止 Issue Date 1988-05-27 Implementation 1989-01-01 Responsible Dept N/A Drafting Unit N/A