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现行 GB/T 21229-2007
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声学 风道末端装置、末端单元、风道闸门和阀噪声声功率级的混响室测定 Acoustics - Determination of sound power levels of noise from air-terminal devices,air-terminal units,dampers and valves by measurement in a reverberation room
发布日期: 2007-11-14
实施日期: 2008-05-01
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