Home / Standards / GB/T 21782.4-2025 GB/T 21782.4-2025 Active Coating powders—Part 4:Calculation of lower explosion limit 粉末涂料 第4部分:爆炸下限的计算 Standard Type GBT ICS 87 CCS G 50 Status 现行 Issue Date 2025-10-05 Implementation 2026-02-01 Responsible Dept 国家标准委 Drafting Unit N/A