Home / Standards / JG 3002.1-1992 JG 3002.1-1992 Abolished 住宅楼梯 预制混凝土梯段 Standard Type JG30 ICS N/A CCS N/A Status Abolished Issue Date 1992-10-12 Implementation 1993-06-01 Centralized Committee 建设部 Issuing Authority 建设部