Home / Standards / JB/T 1750-1992 JB/T 1750-1992 Active 阀门结构要素氨阀阀体密封面尺寸 Standard Type JB ICS N/A CCS N/A Status Active Issue Date 1992-12-24 Implementation 1993-07-01 Centralized Committee 机械工业部 Issuing Authority 机械工业部