Home / Standards / SN/T 0257.2-1993 SN/T 0257.2-1993 Abolished 《出口钢制管法兰检验规程》 Standard Type SN ICS N/A CCS N/A Status Abolished Issue Date 1993-10-08 Implementation 1994-05-01 Centralized Committee 国家进出口商品检验局 Issuing Authority 国家进出口商品检验局