Home / Standards / GB/T 21199-2024 GB/T 21199-2024 Active Dry toner for laser printer 激光打印机用干式显影剂 Standard Type GBT ICS 37.100.20 CCS N40 Status 现行 Issue Date 2024-11-28 Implementation 2025-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A