GB/T 34877.2-2023工业风机标准实验室条件下风机声功率级的测定第2部分:混响室法国家标准
英文:Industrial fans—Determination of fan sound power levels under standardized laboratory conditions—Part 2:Reverberant r...
英文:Industrial fans—Determination of fan sound power levels under standardized laboratory conditions—Part 2:Reverberant r...