Home / Standards / DL/T 660-1998 DL/T 660-1998 Abolished 煤灰高温粘度特性试验方法 Standard Type DL ICS N/A CCS N/A Status Abolished Issue Date 1998-03-19 Implementation 1998-10-01 Centralized Committee 电力工业部 Issuing Authority 电力工业部