Home / Standards / GB/T 18177-2008 GB/T 18177-2008 Active Gas nitriding of steel parts 钢件的气体渗氮 Standard Type GBT ICS 25.200 CCS J36 Status 现行 Issue Date 2008-06-25 Implementation 2009-01-01 Responsible Dept 国家标准委 Drafting Unit N/A