Home / Standards / SY/T 6841-2011 SY/T 6841-2011 Abolished 电法勘探瞬变电磁仪 Standard Type SY ICS N/A CCS N/A Status Abolished Issue Date 2011-07-28 Implementation 2011-11-01 Centralized Committee 国家能源局 Issuing Authority 国家能源局