Home / Standards / MT 319-1992 MT 319-1992 Active 煤矿用输送带U形扣接头 Standard Type MT31 ICS N/A CCS N/A Status Active Issue Date 1992-12-15 Implementation 1992-08-01 Centralized Committee 国家矿山安全监察局 Issuing Authority 国家矿山安全监察局