"Acoustics - Preferre" CNS Standards Search Result |
CNS 13545
- English Version Acoustics - Preferred Frequencies for Measurements 聲學量測上優選的頻率 - 英文版 |
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CNS 13545
- English Version Acoustics - Preferred Frequencies for Measurements 聲學量測上優選的頻率 - 英文版 |
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