Home / Standards / GB/T 4556-2025 GB/T 4556-2025 Active Reciprocating internal combustion engines—Fire protection 往复式内燃机 防火 Standard Type GBT ICS 27.020 CCS J 90 Status 现行 Issue Date 2025-06-30 Implementation 2026-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A