Home / Standards / GB/T 20787-2023 GB/T 20787-2023 Active Reciprocating internal combustion engines—Measurement method for structure-borne noise 往复式内燃机 结构噪声测量方法 Standard Type GBT ICS 27.020 CCS J90 Status 现行 Issue Date 2023-09-07 Implementation 2024-04-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A