Home / Standards / GB/T 6567.1-1986 GB/T 6567.1-1986 Abolished Graphical symbols for piping systems--Basic principles 管路系统的图形符号 基本原则 Standard Type GBT ICS N/A CCS J04 Status Abolished Issue Date 1986-06-27 Implementation 1987-05-01 Centralized Committee 国家标准委 Issuing Authority 国家标准委