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See Chinese contents: GB/T 17483-1998 GB/T 17483-1998: Test code for the determination of airborne noise level of hydraulic pumps
This Standard specifies, under the steady state conditions, the test code for the determination of airborne noise level of hydraulic pumps. This Standard is applicable to measure pump A-weighted sound power level, pump octave band (center frequency is 125~8000Hz) sound power level.
