Home / Standards / MT 428-1995 MT 428-1995 Abolished 煤矿用隔爆型电铃 Standard Type MT42 ICS N/A CCS N/A Status Abolished Issue Date 1995-10-05 Implementation 1995-12-01 Centralized Committee 国家矿山安全监察局 Issuing Authority 国家矿山安全监察局