Home / Standards / GB/T 4446-2025 GB/T 4446-2025 Active Shipbuilding and marine structures—Mooring winches 造船与海上结构物 系泊绞车 Standard Type GBT ICS 47.020.50 CCS U60 Status 现行 Issue Date 2025-04-25 Implementation 2025-11-01 Responsible Dept 国家标准委 Drafting Unit N/A