NBN-EN 29295-1992 1875 Acoustics - Measurement of high-frequency noise emitted by computer and business equipment《声学 计算机和办公室设备噪声发射的高频噪声的测量》.pdf

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NBN-EN 29295-1992 1875 Acoustics - Measurement of high-frequency noise emitted by computer and business equipment《声学 计算机和办公室设备噪声发射的高频噪声的测量》.pdf_第1页
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NBN-EN 29295-1992 1875 Acoustics - Measurement of high-frequency noise emitted by computer and business equipment《声学 计算机和办公室设备噪声发射的高频噪声的测量》.pdf_第2页
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