Home / Standards / GB/T 9900-2025 GB/T 9900-2025 Active Rubber- or plastics-coated fabrics—Ventilation ducting 橡胶或塑料涂覆织物 导风筒 Standard Type GBT ICS 59.080.40 CCS G42 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A