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DIN 45635-38-1986 Measurement of noise emitted by machines airborne noise emission enveloping surface method reverberation room method and in-duct method fans《机器排放的噪声测量 空气传播的噪声 第38.pdf

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DIN 45635-38-1986 Measurement of noise emitted by machines airborne noise emission enveloping surface method reverberation room method and in-duct method fans《机器排放的噪声测量 空气传播的噪声 第38.pdf_第1页
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DIN 45635-38-1986 Measurement of noise emitted by machines airborne noise emission enveloping surface method reverberation room method and in-duct method fans《机器排放的噪声测量 空气传播的噪声 第38.pdf_第2页
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DIN 45635-38-1986 Measurement of noise emitted by machines airborne noise emission enveloping surface method reverberation room method and in-duct method fans《机器排放的噪声测量 空气传播的噪声 第38.pdf_第3页
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DIN 45635-38-1986 Measurement of noise emitted by machines airborne noise emission enveloping surface method reverberation room method and in-duct method fans《机器排放的噪声测量 空气传播的噪声 第38.pdf_第4页
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DIN 45635-38-1986 Measurement of noise emitted by machines airborne noise emission enveloping surface method reverberation room method and in-duct method fans《机器排放的噪声测量 空气传播的噪声 第38.pdf_第5页
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