
Bs En Iso 389-3 - Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 3: Reference Equivalent Threshold Force Levels For Pure Tones And Bone Vibrators
出版:British Standards Institution

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Bs En Iso 389-3 - Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 3: Reference Equivalent Threshold Force Levels For Pure Tones And Bone Vibrators
出版:British Standards Institution
专家解读视频