GB/T 20787-2006
往复式内燃机 中、高速往复式内燃机底脚结构噪声测试规范
Reciprocating internal combustion engines Test code for the measurement of structure-borne noise emitted from high-speed and medium-speed reciprocating internal combustion engines measured at the engine feet
GBT20787-2006, GB20787-2006