Home / Standards / GB/T9217.1-2005 GB/T9217.1-2005 Hardmetal rotary files — Part 1: General technical specifications 硬质合金旋转锉 第1部分:通用技术条件 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A