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2.
Electroacoustics . octave - band and fractional - octave - band filters 电声学.倍频带和分倍频带滤波器
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Electroacoustics - octave - band and fractional - octave - band filters 电声学.倍频带和分倍频带滤波器
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Electroacoustics - octave - band and fractional - octave - band filters 电声学.倍频带和分倍频带滤波器
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Electroacoustics - octave - band and fractional - octave - band filters ; amendment 1 电声学.倍频带和分倍频带滤波器.修改件1
6.
Electroacoustics - octave - band and fractional - octave - band filters iec 61260 : 1995 a1 : 2001 ; german version en 61260 : 1995 a1 : 2001 电声学.倍频程频带和分倍频程频带滤波器