Home / Standards / GB/T 5621-2008 GB/T 5621-2008 Active Test methods of performance for rock drilling machines and pneumatic tools 凿岩机械与气动工具 性能试验方法 Standard Type GBT ICS 73.100.10 CCS J84 Status 现行 Issue Date 2008-07-09 Implementation 2009-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A