Home / Standards / MT/T 698-1997 MT/T 698-1997 Abolished 矿井密闭防灭火技术规范 Standard Type MT ICS N/A CCS N/A Status Abolished Issue Date 1997-12-30 Implementation 1998-07-01 Centralized Committee 国家矿山安全监察局 Issuing Authority 国家矿山安全监察局