Home / Standards / GB/T 21271-2007 GB/T 21271-2007 Abolished Vacuum technology - Noise measurement for vacuum pumps 真空技术 真空泵噪声测量 Standard Type GBT ICS 23.160 CCS J78 Status 废止 Issue Date 2007-12-20 Implementation 2008-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A