Home / Standards / GB/T 40806-2021 GB/T 40806-2021 Active Airborne noise emitted by machine tools—Operating conditions for metal-cutting machines 机床发射空气传播噪声 金属切削机床的操作条件 Standard Type GBT ICS 25.040.40 CCS J50 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A