NEN-ISO 5136-1994 Acoustics Determination of sound power radiated into a duct by fans In-duct method (ISO 5136 1990+A1 1993)《ISO 5136-1990+A1-1993 声学 风机辐射入管道中的声功率的测定 管道法》.pdf

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NEN-ISO 5136-1994 Acoustics Determination of sound power radiated into a duct by fans In-duct method (ISO 5136 1990+A1 1993)《ISO 5136-1990+A1-1993 声学 风机辐射入管道中的声功率的测定 管道法》.pdf_第1页
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NEN-ISO 5136-1994 Acoustics Determination of sound power radiated into a duct by fans In-duct method (ISO 5136 1990+A1 1993)《ISO 5136-1990+A1-1993 声学 风机辐射入管道中的声功率的测定 管道法》.pdf_第2页
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NEN-ISO 5136-1994 Acoustics Determination of sound power radiated into a duct by fans In-duct method (ISO 5136 1990+A1 1993)《ISO 5136-1990+A1-1993 声学 风机辐射入管道中的声功率的测定 管道法》.pdf_第3页
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