Home / Standards / GB/T 1859.3-2015 GB/T 1859.3-2015 Active Reciprocating internal combustion engines—Measurement of sound power level using sound pressure—Part 3: Precision methods for hemi-anechoic rooms 往复式内燃机 声压法声功率级的测定 第3部分：半消声室精密法 Standard Type GBT ICS 27.020 CCS J93 Status 现行 Issue Date 2015-12-10 Implementation 2016-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A