Home / Standards / GB/T 25753.2-2010 GB/T 25753.2-2010 Abolished Vacuum technology - Roots vacuum pump - Measurement of performance characteristics - Part 2: Measurement of compression ratio of the zero throughput 真空技术 罗茨真空泵性能测量方法 第2部分：零流量压缩比的测量 Standard Type GBT ICS 23.160 CCS J78 Status 废止 Issue Date 2010-12-23 Implementation 2011-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会