Home / Standards / GB/T 4299-1984 GB/T 4299-1984 Abolished Symbols for ships ventilation system 船舶通风系统图形符号 Standard Type GBT ICS 47.020.90 CCS U04 Status 废止 Issue Date 1984-04-04 Implementation 1985-01-01 Responsible Dept 国家标准委 Drafting Unit N/A