Home / Standards / GB/T 9207-1988 GB/T 9207-1988 Abolished Cylindrical round-(ball-) nose hardmetal burrs 硬质合金圆柱形球头旋转锉 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