Home / Standards / GB/T 44920-2024 GB/T 44920-2024 Active Spinning process of large-curved tank bottom—Technological specification 大型曲面箱底旋压成形 工艺规范 Standard Type GBT ICS 25.020 CCS J32 Status 现行 Issue Date 2024-11-28 Implementation 2025-06-01 Responsible Dept 国家标准委 Drafting Unit N/A